Category Archives: High Strength

Q: We have plastic molding machines that uses a grade 8 screw to connect to the hydraulic motor. This grade 8 shoulder bolt often breaks and we want something a little tougher. We’ve already increased the diameter but don’t have enough shaft to go larger. Any suggestions? A:  What you might … Continue reading

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Q: We are looking for a very strong non-conductive M8 socket cap bolt that we can use to mount tooling on the end of a conveyor. There is a lot of leverage and force applied to these brackets and we were shearing off the Nylon bolts. Any suggestions? A: One of the … Continue reading

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Q: We have gear mounted alloy steel screws that rotate a loaded arm.  As the gear rotates over its lifetime, these screws ultimately stretch and wear resulting in the bolts loosening, shearing, and breaking. Is there a screw material capable of being made that would help solve any of these issues: … Continue reading

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Q: So I was told that 17-4PH Group 630 bolts per ASTM F593 are heat treated to H1150. So how is a 17-4PH F593 bolt any different from the standard 17-4PH H1150 bolt, as they both have the same heat treatment? A: Great question. Yes, you are correct, they are … Continue reading

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 Q:  I am looking for metric heavy hex bolts for a high temperature structural application that will be running at about 500C. A325M and A490M cannot be used, so I would like to use A193M B16 Heavy Hex Bolt, which could be a good solution. The problem is that I can’t find … Continue reading

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Q: What makes Titanium fasteners per ASTM B348 unique? A:  ASTM B348 is a specification that applies to pure titanium grades 1-4 as well as alloyed grade 5 and 23 titanium. The spec refers to requirements for hot or cold worked bars from which bolts and threaded rod are made. Titanium bolts per … Continue reading

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Q:  We are trying to move away from zinc plated 12.9 bolts due to hydrogen embrittlement problems and the geomet finish is giving us problems due to the diameter of the screw. As a better solution, we have thought about using Super Duplex screws or Nimonic 80A screws.  I understand that … Continue reading

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Q: We are essentially having issue identifying the highest available high strength stainless steel nylon insert nuts. Is Duplex 2205 the best option? A: If you are just looking for strength for your lock nut with a nylon insert, one of the highest strength stainless steel’s you could consider would be 17-4 PH … Continue reading

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Q: What is the difference between “standard” Inconel 718 and Inconel 718 per AMS 5962 A:  While nothing about Inconel 718 is standard, however the most popular variety of Inconel 718 bolts is per ASTM B637.  For this version of Inconel 718, the bolts are age hardened to have a … Continue reading

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Q: Why is Aluminum 7075 often used for aircraft? A: There are many grades of aluminum bolts but those categorized under grade 7075 are specifically used for aerospace and other high stress structural applications that require a combination of strength and extreme light weight. Grade 7075 can be tempered to different conditions, … Continue reading

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Q: How does Aluminum 7075 compare to titanium grade 5? A: Aluminum 7075 can be tempered to many different strengths. The strongest being T6 which not only offers the highest strength. The primary drawback being that it also has low fracture toughness. Aluminum 7075-T6 bolts offer more strength than grade 2 titanium, … Continue reading

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Q: What does the spec ASTM B164 apply to and can you produce hex heads per this spec? I believe it is for Monel bolts? A: Monel bolts per ASTM B164 applies to both Monel 400 and Monel grade 405. This specification standardizes the different processing techniques for each of these materials … Continue reading

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Q: Can you provide me the dimension specs of an MIL-DTL-25027 5/8″-11 Monel 400 nut? A:  MIL-DTL-25027 (superseded by spec NASM25027) focuses on the performance criteria of the locking mechanism of the nut. This spec isn’t for the dimensions/configuration of the nut.

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Q: I need a flat head screw that is both non-Conductive Fastener and can survive shock and vibration. Any ideas? A: Polymers and ceramics are the only options for non-conductive screws. As ceramics are brittle, they would non withstand shock and vibration. In terms of polymers, PEEK is the go-to option … Continue reading

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Q: We are looking for screws to hold down electronic circuit boards. Unfortunately the mounting provisions need to be electrically isolated from the mounts. In addition,  we need strength, non-conductivity, and impact resistance, even at cold temperatures (-40C). A:  A great material to consider would be PEEK screws or PEEK with Glass Fiber reinforcement.  These … Continue reading

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Q: Some grades of stainless steel say they are carbide solution treated. What does that mean? A:  Solution treating, sometimes referred to as solution annealing, is a common way to heat treat stainless steel where the carbide phase is dissolved. In this process, fasteners or bars are heated (to dissolve the carbide) and … Continue reading

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Q: What is the difference between NAS1351 and NAS1352? Aren’t they both socket head cap screws? A: Yes, both NAS1351 and NAS1352 are both socket head cap screws. The primary difference is the threads. NAS1351 pertains to socket head cap screws with a coarse thread pitch, whereas NAS1352 applies to only … Continue reading

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Q: Can you make a 100 deg flat head, with a hex socket driver? A: Yes this screw can be produced but there are some significant trade-offs that need to be realized. Though a hex socket driver is a typical driver in an 82 deg flat head screw, in this instance for … Continue reading

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Q: How does the tensile strength of a metal compare to its hardness?   A: Ok there are a few questions here so let’s start with the strength and hardness comparison first. Tensile strength by definition is the amount of stress a material can handle before it will fail – … Continue reading

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Q: What is the difference between A286 per AMS 5737 and AMS 5732?Q: What is the difference between A286 per AMS 5737 and AMS 5732? A: A286 is an age hardened material. These AMS – aerospace standards – pertain to how the A286 material is solution treated and hardened: • … Continue reading

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Q: What are the mechanical properties of A286 Bolts? A:  Below are the general properties of A286 bolts in terms of high temperature usage and strength. This can change though depending on the AMS or ASTM specifications.  A286 tensile strength 120ksi, 160ksi (cold worked) A286 yield strength 85 ksi, 120 (cold … Continue reading

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Q: Hi, I’m search to get a 1/4″-20 x 3ft long alumina ceramic rod. Is this something you can make? A:  For Extreme Bolt & Fastener, 3″ long is the max length we can produce a ceramic bolt, rod or other fastener.  As you may know ceramics are brittle, but breakage … Continue reading

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Q: I am designing an engine unit and am considering using 1.4980 stud bolts and nuts at elevated temperature. What is the maximum working temperature for stud bolts made of 1.4980 (A-286)? A: A286/Alloy 660 or 1.4980 fasteners are made of a stainless steel alloy which contains iron, nickel, and … Continue reading

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Q: What is the difference between bolting to SAE AS7466 and SAE AS7467? A: Both SAE AS7466 and SAE AS7467 describe bolts and screws made from Inconel 718 (UNS N07718) material equivalent to the European 2.4668 material norm.  The main difference between these two specifications is the testing requirements. The Inconel bolt material … Continue reading

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Q: What is the corrosion (oxidation) resistance of 1.4980 (A-286) fasteners compared to 1.4404 (A4 / 316L ) fasteners? A:  A286 / 1.4980 bolts provide excellent oxidation resistance up to 1500°F (815°C). This makes 1.4980 bolts ideal for high temperature exhaust streams. In comparison, 316L / 1.4404 bolts can typically be applied up … Continue reading

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Q:  What is the difference between screws made to ASTM A1014 and SAE AS7467? A:  When it comes to the material characteristics there is not much difference in these specifications.  Both standards describe bolts and screws made from Inconel 718 (UNS N07718) material equivalent to the European 2.4668 material norm. These both … Continue reading

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Q:  What is the difference between a screw made to ASTM A1014 and AMS 5663? A:  ASTM A1014 is standard specification for precipitation hardened bolts in Inconel 718 (UNS N07718) for high hemperature service by ASTM International. In contrast AMS 5663 is the material standard from another standards agency: SAE International. … Continue reading

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Also known as Alloy 660, A286 bolts are a cost-effective material for high temperature  strength – see why in this snapshot newsletter. What specifications can you offer? A286 is available in ASTM and many AMS standards (often required for aerospace applications) including: ASTM A453, AMS 5525, AMS 5726, AMS 5732, AMS 5737, AMS 5804. What … Continue reading

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Q: What is the difference between Inconel bolts per AMS 5662 and AMS 5663? A: AMS 5562 and AMS 5663 are material standards from SAE International that describe Inconel 718 (UNS N07718) / 52,5Ni – 19Cr – 3.1Mo – 5.1(Cb + Ta) – 0.90Ti – 0.50Al / NiCr19MoNb. The difference … Continue reading

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Q: I have difficulties getting A4-70 A4-80 and A4-100 screws in small sizes (M4, M5 and M6). Can you suggest suitable material alternatives? A: A4 (A4 (1.4401 / 1.4404) is an excellent material for high strength bolts. A4-70 and higher strength screws in small sizes (up to M8) are not … Continue reading

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Is Monel usable at cryogenic temperatures? Not only does Monel offer excellent high strength at temps to 1000F, it is also usable in subzero temperatures. Monel 400 has demonstrated good toughness and ductility in US Navy Tear Tests down to -320F.  In addition, K500 bolts offer increased strength, with little … Continue reading

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Q: What is the difference between Inconel and Monel? A: Both Monel and Inconel are nickel alloys but that is where the similarity ends. Briefly, Monel bolts are mostly used for saltwater corrosion resistance and high strength. They also offer excellent resistance to HF (hydrofluoric acid). Inconel is known for … Continue reading

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Q: What are the advantages of Monel metal? A: Monel bolts are a nickel alloy that offers many advantages. Monel bolts are extremely saltwater corrosion resistant. Monel can provide years of seawater service without corroding. Monel offers high strength, with K500 offering double the strength of Monel grade 400. Monel … Continue reading

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Q: Is Monel stronger than stainless steel? A: In terms of strength, there are many grades of steel and stainless steel. Some of them are even cold-worked for added strength. So to compare Monel to “steel” would be a very broad question – and  difficult to answer without knowing the … Continue reading

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Q: Is Monel better than titanium? A: Monel bolts and Titanium bolts have both similarities and differences. Both materials offer excellent resistance to saltwater. The only difference would be that Titanium has a slight advantage in stagnant seawater which can cause some corrosion to Monel. Both are the top materials … Continue reading

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Q: Is Monel better than stainless steel? A: Monel bolts will offer improved resistance to saltwater over stainless steel. As a nickel alloy, Monel will provide much better general corrosion resistance as well. Monel is also known for its unmatched resistance to hydrofluoric acid which will even corrode pure tantalum. … Continue reading

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Q: What is a Monel Bolt? A: Monel bolts are made of Nickel copper alloy known as Monel. They can also be referred to as Alloy 400 bolts or Alloy K500 bolts depending on the grade. Monel bolts come mainly in two grades Monel 400 and Monel K500. Both offer … Continue reading

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Q: Is Inconel stronger than steel? A: That depends on the Grade of steel and the Grade of Inconel.  Generally if all you need is high strength and corrosion resistance and high temperature stability are not import, Inconel is not the best material. However if the application requires a combination … Continue reading

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Q: What is the difference between Inconel and Hastelloy? A: Inconel bolts and Hastelloy bolts have similarities as well as differences. Inconel is focused on high temperatures with different grades focusing on strength, corrosion resistance and high temp oxidation resistance. Hastelloy C276 bolts are most commonly used for the resistance … Continue reading

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Q: Which Inconel Grade Bolt is the Strongest? A: Inconel 718 bolts are the strongest grade of Inconel. This is because after production they go through a heat treatment process which enhances their strength. Inconel 718 has a minimum tensile strength of 185ksi  and under special specifications this can reach … Continue reading

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Q: Does Inconel crack? A: Any material can crack under the wrong conditions. This would typically happen if you expose the Inconel bolts for the following situations: 1. Corrosive materials or concentrations of corrosive materials outside their capabilities. 2. Temperatures that would exceed their maximum usable temperature. This may not … Continue reading

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Q: What is the strongest metal for bolts? A: MP35N bolts are made from one of the strongest alloys available to industry. MP35N bolts offer a typical ultimate tensile strength of 285ksi and a yield strength of 277 ksi. As an expensive alloy, it is used for the most extreme … Continue reading

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Q: Is Inconel better than titanium? A: Inconel and titanium bolts are completely different classes of materials. Inconel bolts are known for their high temperature and high strength properties. Inconel 600, 625 and 718 are considered nickel alloys and are inherently very corrosion resistant to strong acid media. Titanium screws are known … Continue reading

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Q: Do you know who manufactures Inconel Bolts and Inconel Screws? A: Extreme Bolt & Fastener is one of the suppliers Domestic and International providers of Inconel bolts, screws, studs, nuts, threaded rods and other fasteners. Extreme Bolt & Fastener offers Inconel fasteners in Inconel 718, Inconel 625, Inconel 600 … Continue reading

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Q: We have a fastener application requiring the strength of a Grade 8 bolt (per SAE J429) and the corrosion resistance equivalent of 316 SS (or better). This fastener will be exposed to a marine environment, so corrosion resistance is critical. A: If you application requires the strength of Grade … Continue reading

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Q: How strong is a titanium screw? A: Titanium screws are extremely strong as well as lightweight. They are known for their excellent strength-to-weight ratio. Grade 5 titanium screws have a strength of 148 ksi UTS and 138ksi yield. Titanium Grade 2 screws have a strength of 70ksi UTS and … Continue reading

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Q: What are titanium screws used for? A: Titanium screws are excellent for many applications. They are often used for their excellent resistance to saltwater and chlorides. Titanium screws can service many decades in even polluted seawater and are resistant to both stagnant and rapidly moving oceans. Titanium is also … Continue reading

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Q: Why isn’t titanium used more often than steel for bolts? A: Titanium is more costly than most steel so it is used for more niche situations such as saltwater and chloride corrosion, high strength applications that require lightweight bolting and medical applications where you need a bolt that is … Continue reading

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Q: What are the disadvantages of titanium? A: That would depend on the application. Titanium bolts are ideal for high strength applications – especially when lightweight fasteners are needed. Titanium screws are also excellent in saltwater and chloride conditions – among the best materials for these corrosion issues. Titanium screws … Continue reading

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Q: Are titanium bolts stronger than steel? A: Yes, titanium bolts are higher strength than 300 series stainless steel. Grade 2 is approximately 2 times stronger with a UTS of 70ksi and yield strength of 50 ksi. Grade 5 titanium screws are about 4 times stronger than 316 with a … Continue reading

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Q: Do titanium screws break? A: Any material can break in the wrong conditions. Titanium offers excellent high strength:  Grade 5, 148 ksi UTS and 138ksi yield and Titanium Grade 2, 70ksi UTS and 50 yield. If the conditions require a stronger bolt, the titanium will fail. Strong acids can corrode titanium which … Continue reading

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Q: What heat treatment would you recommend for 17-4PH exposed to salt water? Can I use H900? A: H900 is susceptible to chloride stress corrosion cracking. 17-4 with salt exposure should be H1025 or higher. And, best practice it to use the highest heat treat temp that works for an … Continue reading

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Q: Is there a MIL spec or NAS spec for MP35N socket head cap screws? A: No, there is not an MS or NAS spec that covers MP35N socket head cap screws. For an MP35N socket head, typically we would offer per dimensions of NAS 1351 [or 1352] with material … Continue reading

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Nickel alloys are known for their corrosion resistance, but each material has its own special focus. This newsletter gives a quick summary of the top grades.             Monel: Saltwater…And Strength For years, Monel bolts have been the go-to material for saltwater resistance by the military. … Continue reading

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Q: What is the difference between Inconel 718 standard and NACE 718? A: NACE stands for the National Association of Corrosion Engineers. This group puts forth standards for corrosion resistant materials and when the NACE certification is asked for, the user is typically asking for NACE MR0175. Inconel 718 that meets … Continue reading

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Q: I’m trying to figure out what material will work for my application based on the shear strength. I see you published tensile but not shear. Do you have the shear strength for A286 and Inconel 718? A: Unfortunately, there is no published standard value for shear strength like tensile … Continue reading

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Q: I need a 12 point bolt for a vacuum application with low off-gassing, min yield of 120 ksi, low magnetic permeability and minimum operating temps of 400C / 750F. Is Inconel 718 a good choice? A: An Inconel 718 bolt will certainly work. The only other material you may … Continue reading

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High strength bolts are one of the main reasons engineers look to specialty materials. 17-4PH bolts often fulfill this demand. In this short newsletter we hope to answer many of your questions surrounding the age-hardened stainless steel we call 17-4PH How much strength can 17-4PH provide? 17-4PH bolts can provide … Continue reading

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Q: How does Monel K500 Compared to Titanium Grade 5? A: Both Monel bolts and titanium bolts offer excellent resistance to saltwater conditions. Titanium has just a slight edge on corrosion resistance to stagnant seawater compared to Monel – but this is minuscule. The main differences are strength and applications. … Continue reading

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Q: Can Hastelloy bolts provide high strength? A: Hastelloy C276 bolts can provide about 107ksi of strength. They are typically used for high temperature corrosion resistance. For corrosive applications where higher strength is needed, you may also want to consider Inconel 625. Inconel 625 bolts offer 144ksi of strength and … Continue reading

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Q:  Hi, I need a torque range for a A286 (aged, 160 ksi UTS) 1″-8 hex bolt. The calculator gives a torque value of 826 ft*lbs but is there a range that is acceptable? A: One thing you have to remember about torque, is it is an approximation. You could … Continue reading

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Q: We have a drawing for a 17-4 1″ bolt that we would like to order which can be heat treated to H900 – H1050. Are there any heat treat conditions that we should avoid? I’ve heard H900 can lead to sudden failure? Is this true? A: With the 17-4PH … Continue reading

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Polymers at Cryogenic Temperatures Most often people want to know how hot a material can be used up to in an application, however for cryogenic applications, in media like liquified gasses (nitrogen, oxygen, carbon dioxide, LNG, etc.), we need to understand how materials perform at very cold temperatures.  Polymer fasteners … Continue reading

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Q: My customer is asking me for a hex head that is QQ-N-286 per MIL Spec. Do you know what he is asking for? I’m confused. A: Yes we can help. First let’s look at the QQ-N-286. This refers to material Monel K500. Monel is a nickel alloy used for … Continue reading

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Q: Your strength chart for A286 says it offers 120-160 ksi tensile strength. What does this mean? And how can I insure I get bolts that are 160ksi? Is this the spec ASTM A453 Grade 660? A: We can insure you get your bolts made to this tensile strength but … Continue reading

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316 stainless is a familiar alloy to many of us and perhaps one of the most widely used fastening materials. Though it serves a critical function for industry, 316 can often fall short in servicing challenging high strength, temperature and corrosion resistant applications. Here is how it measures up in … Continue reading

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Q: I have a deep sea marine application that requires saltwater resistance and tensile strength around 125ksi. In addition to the saltwater and strength parameters, I’m also dealing with waters that can be stagnant. Not sure if that makes a difference. Would Monel K500 be a good choice. A: Monel … Continue reading

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Q: I’m running a process that requires a titanium hose clamp. I need a clamp that won’t damage the hose and provides a reliable seal as we are dealing with toxic chemicals in a very technical application. Is one type of hose clamp better than the other? A: A worm … Continue reading

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Q: I’m currently cruising the internet looking for the best way to support a ceiling via suspension from structural steel. We’re building a freezer, and I don’t want thermal bridging from the inside of the freezer up to the structural steel, so a metal rod is pretty much out of … Continue reading

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Q: I have a high temperature application that requires bolts that can withstand around 1900F. There is almost no corrosive contamination – strictly heat and oxidation resistance are required. I see both Inconel 600 and 310 stainless can be used at this temperature – what is the difference and which … Continue reading

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Q: What is the difference between an allen, hex and socket driver? A: All these drivers are the same. They can be offered in a socket head cap screw (hence the term socket), pan head and flat head. An allen/hex/socket drive offers a more secure connection than say a flat … Continue reading

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Q: I have a high temperature application that runs at about 1900- 2000F. Would a ceramic bolt be a good idea. I need to have some strength and Alumina says it offers 75 ksi UTS? Will that work? A: Ceramics are not often a good idea when their are any … Continue reading

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Q: I have a question on 17-4PH H1150, do you know what the tolerance on the material strength is? Ie +/- 10% ? A: For a 17-4 H1150 bolt, we would use the ASTM A564, Type 630 spec to define the strength as 115 KSI Min Tensile, 105 KSI Min … Continue reading

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  Inconel bolts are a nickel alloy fastener that are known for their use in high temperature applications that also require high strength. Many grades are also used for their excellent level of corrosion resistance in harsh chemical environments. This brief newsletter highlights the unique attributes of each Inconel bolt … Continue reading

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Q: What’s the difference between Hastelloy C276 and Inconel 625? A: C276 bolts have an edge in corrosion resistance on Inconel 625 bolts. Typically Hastelloy bolts are the go-to in many harsh chemical environments and offer improved resistance most notably in hydrochloric acid. Hastelloy is also renowned for their resistance … Continue reading

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Q: What is the difference between a Duplex nylon insert and all-metal lock nut? I’ll be using this in an offshore marine application for salt air resistance and strength. A: The main things to consider between an all metal and nylon insert lock nut is the temperature and the corrosive … Continue reading

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Q: Can you suggest a different material with similar strength-to-weight ratio as the 7075, that can be produced with a diameter M3-0.5? A: Since an M3 bolt is too small to be produced from Aluminum 7075, I would suggest either grade 2 titanium bolts or grade 5 titanium bolts.  For … Continue reading

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Q: I need an Inconel 625 screw for a high temperature environment with trace corrosives. I’d need torx head bolt style. How many times can I tighten and loosen this type of bolt before I need to replace it? A: You should be able to get hundreds or even thousands of … Continue reading

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Q: I need some suggestions on bolting for an application that is running at 610 degree C in a thermal cycling environment (Room temperature to 610 deg C). Is A286 a good fit? A: This will depend a bit on the loads you are dealing with, but one of the … Continue reading

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Tensiled Data vs Aged Condition Updated 6 2018Q: I have a customer asking me for 17-4PH stainless, but says they need it heat treated to H1100. What does this mean? A: 17-4PH bolts are available in many different heat treatment options. This means that different heat treatments such as H1150, H1100, H1075, etc are applied to the … Continue reading

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Q: I am currently using 18-8 stainless steel socket head cap screws coated with MoS2 in a vacuum. I am having problems with the screws clamping force is sometimes loosening and they sometimes gall and jam, due to elevated temperature (700° to 1000° C) and heat cycling. What would be the most cost-effective screw … Continue reading

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Q: We are currently using A286 bolts per ASTM 453 at 1200F and are having some issues with durability as the tensile strength we originally calculated necessary was 130ksi but seems like we need higher strengths. Any ideas? A: In this type of environment you should consider A-286 in the … Continue reading

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Q: I have a customer who needs 316 Stainless Steel B8M bolts. Would Class 1 or Class 2 have a higher strength? A: If a higher strength is needed you would want to use Class 2. B8M Class 2 is carbide solution treated and strain hardened whereas Class 1 is … Continue reading

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image.pngQ: I’m working on a project that is using Titanium bolts for our equipment and we are considering a few different sizes and grade bolts; we are considering Gr.2, Gr.5, Gr.7 and Gr.12. What would you typically specify as the maximum tensile allowable (i.e. 2/3*yield) and the maximum shear allowable … Continue reading

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Q: For a high temperature oxidation-rich environment which would be better Inconel 600 or 601 bolts? A: For this situation it really depends on the temperature range you are dealing with because both an Inconel 600 bolt and an Inconel 601 bolt offer good oxidation resistance. Inconel 600 can service … Continue reading

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Q: I’m dealing with a brackish marine environment where fresh and salt water combine. I need a strong bolt around 120ksi of tensile strength and have been using Titanium Grade 5, but they are quite expensive. I was wondering if there is a more economic alternative that can handle this … Continue reading

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Q: I’m working with a high temperature waste to fuel application that operates at 1000F normally but could spike to 1200F. Currently I am using Grade 8 bolts but I am concerned about the oxidation resistance of them and their stability at high temperatures.  Do you have any material recommendations?  … Continue reading

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Q: How does titanium compare to Aluminum 7075 in terms of strength and density. I need a really strong material with a low strength to weight ratio. A: A titanium bolt will be more dense than an Aluminum 7075 bolt with a density of  4.51 g /cm3 compared to 2.81 … Continue reading

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Q: I work on oil rig repair and we are required to have Hastelloy bolts that meet the NACE MR0175 standard. What is this exactly, and do you offer these? A: To answer the easy question, yes we offer Hastelloy screws per NACE MR0175. Now for the my involved question.  … Continue reading

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Q: I have a subsea application that is exposed to extremely rapid moving salt water. Not only is it faced with these corrosive conditions but it must also be strong – 150 ksi  tensile strength – in order to withstand these rough waters and maintain the structure’s integrity. Can you … Continue reading

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Q: I’m a purchasing agent and one of our engineers is requesting a 1/2″-13 x 2″ hex head bolt that is material A286 meeting F2281? What is F2281 mean? A: Good question.  F2281 is a national standards specification put in place by the ASTM. An A286 bolt that meets the … Continue reading

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Q: We are in the planning process for a structure that must withstand 160 to 165 ksi of tensile strength. Do you have any suggestions on bolting material? A: An ideal bolt for this application would be a 17-4PH bolt. 17-4PH is a material that is over 4 times greater … Continue reading

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Q: Perhaps you can help. I am looking for a stainless-steel substitute to replace a standard SHCS. I will be fastening a stack of hydraulic valves onto a 6061-aluminum manifold with a 3000 PSI working pressure. I am not sure what the tensile strength needs to be comparable to a … Continue reading

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Q:  I am working on two different exhaust systems based on 409 SS. I am looking for a 3/8-16 1” long bolt which can be fastened to threads in 409 SS. Currently, I am using Grade 8 bolts made from 300 M with Nickel Based Anti-Seize. The temperature can go … Continue reading

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Q: I am looking for a bolt that will withstand working temperatures of around 800 degrees. We are having issues using grade 9 bolts that after multiple oven cycles we are having to cut the bolts off due to them being locked up. We need a bolt that will withstand … Continue reading

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Q:We have an anodizing process that sends low voltage current through aluminum bars. We have been using 316 stainless bolts, but over time the electricity heats the bolts up red hot, then we lose clamping force. The tanks contain a solution of 15% sulfuric acid, so there is some corrosion … Continue reading

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Q: I need a material that can stay oxidation resistant at 2000F in a cyclic temperature environment. Any suggestions? A: One of the best choices is Inconel 601, UNS N06601,which is highly resistant to oxidation up to 2200°F and can handle even severe thermal cycling. These Inconel bolts will offer … Continue reading

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Q: I’m working on a medical prototype that requires a strong bolt that is biocompatible. I know I want titanium but not sure which grade is adequate for medical use. A: Typically medical grade titanium screws are produced from grade 23 or TI 6AL-4V ELI or grade 5 6AL4V. A … Continue reading

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Q: I have a high temperature exhaust stream that is part of an air-to-air energy recovery system that experiences temperatures around 1300F consistently and can go up to 1500 intermittently. I need to ensure that the bolts have a tensile strength of 130ksi. Can you help me out with this? … Continue reading

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Q: What is the difference between using aluminum compared to a titanium bolt for a medical fastener? A: Medical grade titanium bolts – grade 5 – have an incredible strength to weight ratio. They are 60% denser than aluminum but more than twice as strong. This makes a titanium bolt … Continue reading

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Non-magnetic fasteners service a variety of applications mainly where magnetic “interference” needs to be avoided. Cryogenic and medical applications such as MRI’s are just a few of the key places non-magnetic fasteners are needed. This newsletter highlights a few specialty metal fasteners that can service non-magnetic needs. Inconel Bolts Non-magnetic … Continue reading

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Q:How does Nitronic 60 compare to an A286 bolt for high temperature strength? A: That depends on the strength required and the temperature of your application. A Nitronic 60 bolt is known for its high temperature properties up to 1800F. At these extreme temperatures it can offer good resistance to … Continue reading

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Q: I’m looking for a bolt that can handle salt air and be structurally sound with a tensile strength of about 115-120 ksi max – do I require a titanium grade 5 bolt because I know they are costly? A: Probably not at that tensile strength. A Super Duplex bolt … Continue reading

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Q: Does Inconel 600 provide the same level of corrosion resistance as an Inconel 625 bolt? A: Not typically. For corrosion resistance, an Inconel 625 bolt is one of the more corrosion resistant versions of the Inconel alloys and it can withstand many strong hot acids. While not as corrosion … Continue reading

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Q: I’m looking for a high temperature, strong fastener. I noticed that Hastelloy C276 bolts can be used to 1500F where A286 screws can only be used to 1300F. Does that make Hastelloy a better choice? A: Typically not. Hastelloy screws are most often used for high temperature corrosion. For … Continue reading

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Q: What is the difference between alloy 330SS and 310SS bolts? A: Good question. Alloy 330 and 310 are fairly similar however there are some differences. Alloy 330 fasteners offer high temperature protection, oxidation and carburization resistant to 2100°F whereas 310SS maxes out at 2000°F. In addition, alloy 330 bolts … Continue reading

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Q: I have a high pressure application that exposes my flanges to sulfuric acid? Can you suggest the best flange and material for this situation? A: For high pressure applications weld neck flanges have a beveled end that, when connected to a pipe, creates a trough for a strong weld … Continue reading

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Q: I cannot obtain an adequate seal with my existing metallic gaskets because my current flange and fastener maximum yield strengths will be exceeded. Any suggestions? A: JP/JG gaskets, with their unique design, offer and low tightening requirement across the surface of the gasket face in order to obtain extremely … Continue reading

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Q: I need a high strength salt water resistant flange for a naval application. Will be in rapidly moving seawater. A: Here I would suggest a Monel K500 flange. Monel K500 is extremely strong as it is age hardened. It offers 160 ksi of ultimate tensile strength. Also Monel flanges … Continue reading

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Mismatch ConnectionsQ: I need a gasket for dissimilar flange faces with an 8mm gap. Is there a solution you can provide to fit this issue? A: Yes. We can produce custom JG / JP gaskets that fit dissimilar flange faces for a tight seal. JG / JP gaskets could be made … Continue reading

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Q: We are looking for a non-conductive  screw that gets close to the strength of 316 stainless steel, ideas? A: The best we could offer would be our glass fiber reinforced PEEK screws. It has nearly double the tensile strength as natural PEEK at about 22,800 psi. You could also … Continue reading

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Q: We are researching a bolt to be used in a medical implant? Is there a standard material you can suggest? A: While there are a variety of possibilities depending on the requirements for the screw, a go to material for many implantable fasteners for good strength and biocompatibility, is … Continue reading

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Q: I’m looking for a radiopaque material for an xray application. I’ve tried lead but need something that is more intense that could be made into a screw. Is there a material you can suggest? A: Tungsten screws are excellent for radiopaque x-ray applications. Tungsten offers a higher density than … Continue reading

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Q: Do ceramic fasteners provide strength? A: The answer to your question is both yes and no. They provide decent tensile strength similar to some stainless steels(Aluminia bolts has a tensile strength of 30 ksi and Zirconia screws 75 ksi), however they don’t have any yield strength. Due to the … Continue reading

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image.pngQ: Looking for a bolt rated 320 psi for use at a temperature of  1292F on an Incoloy 80oHT flange? Suggestions? A: Assuming you want hex head bolts and Inconel 625 is probably your best choice at those temperatures. At about 1300F, Inconel 625 bolts (per the chart below) should … Continue reading

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Q: I have a high temperature exhaust stream that needs an oxidation resistant fastener? Any suggestions, my temperature is about 1400F? A: For this temperature you have a few options depending on the strength you need. One option may be Nimonic 80A bolts which are usable to about 1500F. Also … Continue reading

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Q: What would be the highest strength polymer fastener I can use to 400F? A: For this application, probably the best option for you would be PEEK fasteners. PEEK screws are usable to 500F and are available in three levels of strength. Unfilled natural PEEK fasteners offer 16,000 psi tensile … Continue reading

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Q: Can you tell me how the mechanical properties of C276 compare to the A4 stainless? A: That would depend on the grade of A4 you are talking about but as a rough comparison Hastelloy C276 bolts per ASTM B564 would have a MIN Tensile of 100ksi and a MIN … Continue reading

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Q: Can you tell me the difference between Hastelloy C276 and Inconel 625? They both seem to be corrosion resistant to sulfuric acid but I also need a high strength material. A: Yes both perform well in sulfuric acid application, but in terms of corrosion resistance, Hastelloy C276 bolts would … Continue reading

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Duplex Steel: Strength & Corrosion Resistance Beyond 316 316 Stainless steel fasteners have many applications, but if you are looking for an all-around improved fastener without breaking the budget, Duplex alloys might be a good choice. Duplex steel fasteners are known for their improved strength (being about 2x stronger) and … Continue reading

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Q: What is the max temperature I could expose PEEK screws to HCl? A: This depends on the concentration of the HCl but if you were at about 15%, the PEEK fasteners can be exposed to about 100C of hydrochloric acid solution. See this chart https://www.extreme-bolt.com/peek-fasteners-flanges.html#Chemical. That is the max … Continue reading

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Q: We are looking for high shear strength non-conductive flat head screws being used for electrical insulation. The screws need to have a high shear strength quality as other plastics screws we have tried have broken. Do you have a material you can recommend? A: With regards to a polymer … Continue reading

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Q: I’m looking for a polymer that can be exposed to low concentration of sulfuric acid. Which polymer do you recommend? I tried PTFE but they don’t seem to be as strong as I need. A: PTFE and PFA fasteners offer the highest polymer corrosion resistance but the trade-off is … Continue reading

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Q: I’m looking for a material that can service a brackish water environment with high strength around 100ksi, would SMO 254 work for me? A: In terms of the corrosion resistance, yes, but for strength you are right on the edge of the capabilities for 254 SMO fasteners. 254 SMO … Continue reading

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Q:  Hello I am researching titanium and C276 hardware for a submerged application in a high chloride (20,000 mg/L) elevated temperature environment (125F). Corrosion resistance is more important than shear or tensile strength in this application. A: Titanium screws should be a good choice for your application especially Grade 2 … Continue reading

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Q: I’m looking for a nut in a large metric size. I know I can’t get it made in this large a size for class 10 steel so I’m hoping you can recommend a material that can be made to an M16 with similar strength. A: If you are looking … Continue reading

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Q: Currently I’m using screws made of 400 series stainless steel for use in factory machinery that is moving in a circular path creating a centrifugal force.  Our existing bolts are breaking and we’re looking for a bolt with a more rigid type of material that will not break or … Continue reading

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Q: I’m in need of  hex head bolts for a gas turbine hot section application. These bolts would need good strength and min. temperature tolerance of 1000 degF. Any suggestions? A: A286 bolts are an option, but would be on the lower end of these materials in terms of temperature … Continue reading

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Q: What is the difference between Nitronic 50 and 60? A: Both grades of Nitronic offer similar strength which is nearly double the yield strength of 300 series stainless steel (Nitronic 50 100ksi UTS and Nitronic 60 95ksi UTS). The real difference is in the temperature capabilities and the usage … Continue reading

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Q: What is the difference between the different grades of tungsten and why would I choice one vs the other? A:Tungsten fasteners are available in commercially pure tungsten (Tungsten CP) which is 99.95% pure. This grade offers the highest density, strength and hardness of all the grades. It is also … Continue reading

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Q: I have an application with high temperature exhaust that requires a high strength bolt for oxidation resistance. Temps are pretty consistent around 1300F. Would Inconel 718 bolts be a good choice? A: Inconel 718 would definitely be one good option. Inconel 718 bolts offer 210ksi tensile strength and are … Continue reading

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Q: I’m in need a high strength bolt that can not only withstand temperatures of 1000F but also be exposed to chemical contaminants from time to time. The 1000F is the max, probably not the constant. Strength would need to be around 150ksi. Contaminants would be salts and some low … Continue reading

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Modern day engineering is key to helping the world through this difficult time, and specialty material bolts make it possible. Materials like titanium, PEEK and 17-4PH provide the corrosion resistance and high strength needed for manufacturing and high-tech distribution. This newsletter shows some of the ways Extreme Bolt & Fastener … Continue reading

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Q: I’m looking for a high density material that is also high strength. I need set screws for a weighted part, but they also need to have about 120ksi of tensile strength. Is this possible? A: Yes, for this type of application you’ll want to use pure tungsten or a … Continue reading

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Q: I have equipment that requires a high strength bolt. Temperature and corrosion are not an issue, solely strength. I had tried Super Duplex thinking that would do the trick, but I’m still having breakage. Any ideas? A: For an application that exclusively requires high strength, you might want to … Continue reading

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Q: I’ve been using Monel 400 for a saltwater application but I’m having issues with bolts notwithstanding the application pressure. Is there a saltwater resistant fastener that can give me higher strength? A: Yes for higher strength saltwater resistance you have two options. Monel K500 bolts are an age hardened … Continue reading

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Q: We need a custom bolt for securing a 304SS flange to a pressure vessel located in a submerged DI water pit. We have a few concerns/requirements. First, we need to ensure that galling and corrosion do not prevent us from removing the bolts during service events (between 1 and … Continue reading

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Q: I am looking to eventually get a quote for some 3/8″ studs and nuts. I need to have a min yield stress of 29 ksi at 700F.  SA-540 Grade B22 Class 2 or SB-637 should work. Is this something you can provide? A: These are very different materials: A-540 Grade B22 Class … Continue reading

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Q:  How do ceramic alumina screws compare to steel screws as far as strength goes? The load would most likely be tension, but some compression too. A:  If you compare 316 Stainless Steel to Zirconia ceramic screws, their tensile strengths are similar (around 75 ksi tensile) with Alumina ceramics being … Continue reading

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Q: Can I use a wedge anchor to attach a piece of equipment to metal? I need a high strength fastener. A: No. Wedge anchors are used to strictly for fastening into concrete. The anchor is actually an expansion mechanism which fans out and locks the bolt into concrete as … Continue reading

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Q: I need a large quantity of fasteners that can offer about 100ksi of tensile strength and provide me resistance to seaspray and salt air. Is titanium a good choice?   A: Titanium grade 5 bolts will meet both these requirements, but will probably be overkill in your situation. For this … Continue reading

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Q: Looking at options to increase the tensile strength for a socket head cap screw. We are currently using grade 8. Would Waspaloy be a good option? A: If you are looking for a fastener with higher strength than Grade 8 Alloy Steel (150 KSI Tensile, 130 KSI Yield), and … Continue reading

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Q: What stud and nut material should I use with a ANSI 600# Alloy 800 HT pipe class max temperature 1650°F. A: Given that you are at a high temperature and pressure I would recommend going with an Inconel 625 stud. This will provide the best combination of high temperature … Continue reading

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Q: Looking to change to a non-conductive material for use in a high impact application. Would Alumina or Zirconia ceramic fasteners be a good fit? A: We could certainly quote you some ceramic hardware, however ceramics may not be the best non-conductive choice for a high impact environment.  Ceramic fasteners … Continue reading

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I am looking for the best available material solution for Oil&Gas industry with occasionally presence of H2S. For now we are using A286 but I am not sure about its H2S resistance. What kind of material you can recommend that is comparable to A286 and is H2S rated?   When … Continue reading

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Q:  Im looking for Inconel 718 bolts but I need a bit more strength than what is typically offered as a min of 185ksi Ultimate Tensile. Is it possible to make Inconel 718 stronger than that? A: Yes…Actually Inconel 718 bolts are available in a few different flavors. The most … Continue reading

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Q: I am in need of six 7/8″ diameter bolts, 9″ in length, that can withstand about 230,000 psi in tensile stress for infrastructure project. Do you have any bolt that can meet this strength requirement? A: When you are talking about extremely high strength in the range of 230 … Continue reading

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Q: I’m looking for bolts/nuts material able to withstand to cycling temperature changes from 20 Celsius up to 600 Celsius. Strength is also important . Looking for something with tensile strength at least 800 Mpa. The application is diesel engine exhaust manifold. Looking at your web site not sure Inconel … Continue reading

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Q:  Looking for bolts that will be used for large Diesel engine exhaust compensators in a power plant. The normal operating temp of the exhaust is 700 degrees F at full load. Loads do fluctuate often and engines experience downtime. The exhaust system does experience extreme force and vibration. Any … Continue reading

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Tungsten alloy chart Revised 6 28 18Q: I see that you list 5 different grades of Tungsten on your site, would you maybe help me choose which is the best for my application? A: There are two important differences. First, pure tungsten screws are stronger. For example 99.95% tungsten offers 142 ksi UTS vs Class 1 … Continue reading

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PEEK, PVDF and PTFE all offer lightweight, electrical & thermal insulation and great corrosion resistance. But when it comes to strength, temperature, purity and corrosion, each has its niche. The newsletter points out which is best to use in different conditions. TEMPERATURE PEEK and PTFE screws offer excellent high temperature … Continue reading

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Q: An application with limited space using a #4-40 screw with an assumed tensile strength of 120,000 PSI. This screw continues to break. Do you offer a screw with a higher strength? Also, This screw is used to hold a plate to the end of an air cylinder.  It probably … Continue reading

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Q:  For a marine project will 316SS cold worked (grade A4-80) hold up in strength pretty close to Monel K500? And what is the price comparison? A: Thanks for contacting and good question.  The major difference is the strength and corrosion resistance. You will have decent strength of a A4-80 … Continue reading

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Q: I need a material that offers about 80-90ksi yield but is also corrosion resistant to low concentrations of sulfur acid. I’m tried 17-4Ph but its not working? Any ideas. A: Yes, 17-4PH fasteners are excellent for high strength like you need, but are not really geared for corrosion resistance … Continue reading

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Titanium is an amazing material offering strength, lightness of weight, and corrosion resistance but there are also instances that titanium should not be used. This brief newsletter covers the do’s and don’ts of titanium screws. Do Use for Saltwater & Chloride Resistance One of the most noteworthy uses of titanium … Continue reading

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Q: Are there any materials I can use with the strength of 17-4PH in the H1150 heat treat, but with better corrosion resistant properties. I have low levels of sulfuric acid and chlorides that seem to be attacking the 17-4 steel. A: The best choice for both extreme strength and … Continue reading

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Q:  I have a high temperature application that can reach close to 1800F that requires not just corrosion resistance from low levels of acid and salt contamination, but I also need good strength. Would Alloy 310 bolts work? A: Alloy 310 bolts could be a possibility, depending on the strength … Continue reading

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Extreme high strength fasteners made from advanced alloys allow industries such as aerospace, mining, and oil & gas to push the limits of what is possible.  With requirements of ultimate tensile strengths beyond 200ksi this newsletter reviews these materials, their specific traits and niches.   17-4 PH Age hardened, 17-4PH … Continue reading

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Q: I’m looking into a bolt which will be used to create vacuum seal with graphite  and hold vacuum of 1 Pa. I’ve tried Inconel 718 but they seem to fail loosen at high temperatures, and my system requires 1500 F. Because I am trying to seal a vacuum system, … Continue reading

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From thermal processing and furnace applications to the extreme demands of aerospace, several high temperature alloys are available each with unique traits and capabilities. This brief newsletter will outline the primary fastener materials that are commonly used for excellent high temperature and oxidation resistance. Best High Temperature Oxidation Resistant Fasteners … Continue reading

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Q: We are a manufacturer seeking a fastener for an air cooled engine’s head bolt replacement project. The fastener would be used to hold a aluminum cylinder head. We would like to use 17-4PH but are concerned about galling? A: As you would be using two different materials, the 17-4PH … Continue reading

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Q: I’m in the testing phase of a new application that will require a high strength bolt that has a yield strength of about 220ksi. The biggest problem is that the bolts will also be exposed to burst of high temperature of about 1000F. Is there any material you can … Continue reading

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Q: I’m having issues with thread galling. We’ve switch to coarse threads and tried to slow down installation speed/over-tightening. Any other ways we can prevent this? A: There are a few other things to consider in reducing thread galling. First, when possible use dissimilar metals with different hardness. Having material … Continue reading

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Q: I work in the food industry and need a larger sized polymer fastener sized 1/4-20 x 2.5″. I tried PTFE but it isn’t does not seem to have enough strength. It also needs to be FDA approved and offer moderate corrosion resistance. A: Not knowing the specific strength requirements … Continue reading

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Q: I need some high temperature engine components that can provide high strength (100ksi yield) to 1000F as well as oxidation resistance? Are molybdenum bolts good for that? A: Though Molybdenum is excellent in high temperature environments its generally reserved for very high temperature vacuum application where no oxygen is … Continue reading

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Q: I’m running a chlor-alkali process and have been using Duplex 2507 bolts. I choose them for their yield strength and corrosion resistance but am still having issues with the chlorine. Ideas? A: Many chlor alkali processes use Titanium fasteners for its combination of high strength and chlorine resistance. Grade … Continue reading

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Q: I work in the fusion technology field, specifically in a plasma physics laboratory. We are currently using a large number of A-286 screws. The screws have to withstand the high pre-loads required to insure the ultra high vacuum tightness of our facilities (generating stresses in the screws of up … Continue reading

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Q: I am looking for some high tensile strength studs with good electricity resistance. I think zirconia of aluminia material will be suitable but I am open for suggestions. The studs would be about 5 inches long. A: Probably ceramics fasteners are not the best choice for this situation. It … Continue reading

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Q: Hello, I currently have an application that requires high strength set screws. One of our machines uses air cylinders with threaded shaft ends made of alloy steel set screws. The set screws are actually shearing off in our application, causing damage to the cylinders and equipment. I am looking … Continue reading

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Q:  Hi, I need a 1.25” X 15” bolt that can operate in continuous temperatures of 1000F. Currently we are using a heat treated carbon based 4140 fabricated machined bolt. At these temps the bolts are “Stress Relaxing” and we are losing our clamping pressure. In addition, when we change … Continue reading

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I have a high temperature and strength application when would I choose Waspaloy bolts verses Inconel 718 bolts? Great question. Waspaloy and Inconel 718 bolts are both excellent in high temperature strength situations. In terms of strength, Inconel 718 has a edge over Waspaloy offering 210 ksi (ultimate tensile strength) … Continue reading

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Q:  I have a lightweight application that requires high strength. I’ve tried aluminum screws because I thought they were ultra lightweight but after breaking I increased my bolt size and now I have more weight and still breakage. No sure what to do. A:  Yes aluminum is a lightweight material … Continue reading

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Q: My customer is having an issue with his stainless steel fastener bending. They are being used in a high-heat application running at approximately 1600F. Is this normal? Any ideas? A: This is definitely expected at these temperatures. If temperature and strength are you main focus, I would suggest either … Continue reading

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Q: I have a high strength application that requires resistance to damp salt air and occasional sea splash, I’m using Monel 400 but it’s not holding up the the 75ksi of yield I need. Lots of broken bolts? Is is corrosion or  strength? Thoughts? A: Your issue isn’t the corrosion. … Continue reading

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Q: I’m looking for guidance on fasteners with good resistance exposure to sodium hypochlorite. The material would need to be bleach-resistance, but also have a tensile yield strength of over 80ksi.

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Oilfields are subjected to a diversity of corrosive elements including carbonic acids, sour gas (H2S), and fracking/stimulant acids such as hydrochloric and hydrofluoric acid. Naphthenic acids and simple organic acids are also found in crude oil extraction. In conjunction to acids, these environments contain sand and other abrasive elements which … Continue reading

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Q: I need high yield strength material what is the difference between MP35N and A286? Which is more economic? A: Overall MP35N is perhaps the highest yield strength bolt material available to industry with a typical yield of 250 ksi compared to A286’s 111 ksi; though it is extremely expensive. A286 … Continue reading

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Q: I need a material that will be suitable for oil and gas use. Submersion in hydrogen sulfide, carbon dioxide, hydrocarbons, salt water at temperatures up to 325F. Crevice corrosion has been a factor. Also need 170ksi min tensile strength. Plus we’d like to torque a 3/8-24 fastener to 50 … Continue reading

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Q: I need to attach an LNG cryogenic pump and need to make sure I use a material that can withstand temperatures of –120 °F as well as don’t embrittle when fluctuating back to room temperature. Any suggestions? A:  Monel K500 is a common choice for  cyrogenic fasteners. It can … Continue reading

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Q: I was looking at your site and noticed that the ceramics don’t have a yield strength. What does that mean? A:  Metals and plastic have yield strengths because they start to stretch before breaking… the point where they start stretching is the “yield point” and the stress at that … Continue reading

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Q: I’m looking for a chemically resistant polymer that can withstand chlorine and chlorine dioxide as well as a decent amount of weight and tension (around 27 lbs of weigh). Can you suggest a material? A: Of course it depends on the concentrations and temperatures you are operating at but generally … Continue reading

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Q: I’ve got in a high pressure sour gas well. We’ve been having trouble with 316 stainless steel components breaking. I need a solution but not sure what to use. A: High pressures and sour gas combined can cause cracking and corrosion in most standard stainless and alloy steels. Depending … Continue reading

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Q: I’m working on a structural project that not submerged in salt water but exposed to moist salt air. I’m not only concerned about the supports having fasteners that won’t corrode but also having a fastener that is high strength. Any suggestions. A: Though I don’t know the specific strength … Continue reading

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inconel-monel-chart-copyThey rhyme, are both used in extreme environments, and are both nickel metal alloys, but Monel and Inconel are actually very different. But how? Let’s start with basic chemistry. Monel is a nickel-copper alloy and Inconel is a nickel-chromium alloy. So what does that mean for your extreme application? We … Continue reading

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Q: I have a waste water purifying situation where I’m using chlorine to treat the water. In addition to the acidic solution produced the fastener will also experience high loads, so I’m also concerned with stress corrosion cracking. Currently Super Duplex 2507 is not doing the job. Any recommendations on … Continue reading

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Q: I have a robotic application where I need a fastener that is both lightweight and strong. Also, the style of the fastener needs to provide a wide clamping area in a low clearance area. Any suggestions? A: A material you might consider is Titanium, grade 5. The most common … Continue reading

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Q: How does creep occur and what polymer is best to prevent this? A: Creep is the permanent deformation of the material caused by constant load or stress, usually accompanied by constant high temperature. This can result in permanent changes of the fastener shape as well weakening and fracturing of the … Continue reading

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Q: What is the highest temperature I could use Inconel 718 bolts? A: Inconel 718 fasteners could be used reliably up to about 1300F.  Because Inconel 718 is  heat treated or age hardened at 1325F, going beyond 1300F will significantly affect its strength properties. Furthermore, its strength may not fully return. … Continue reading

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weld-neck-flangeQ: I have a high pressure application with HCl at fluctuating temperatures. Can you recommend the best flange to provide a safe secure joint? A: Hands down, the weld neck flange is best for these types of hazardous, high pressure applications. Weld neck flanges are easily identified by their long … Continue reading

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threaded-flangeQ: When do you recommend to use a threaded flange? I need a flange that can be changed easily & frequently. A:   After speaking with the customer, I found out that he has a pilot plant where he will be frequently changing parts. In this case a threaded flange is … Continue reading

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Q: How do I calculate the actual break force or yield of a bolt for a particular size? A:   The Ultimate Tensile properties for a material like Hastelloy C276 is independent of the size of the bolt, as its based on the x-sectional area of the bolt which typically … Continue reading

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Q: What advantages does Zirconia have over Alumina? A:   Usually for most high temperature or electric insulator applications where ceramics are needed, alumina ceramic fasteners are the most popular choice due to their properties and relatively affordable price compared to zirconia fasteners. However sometimes the extreme properties of zirconia fasteners … Continue reading

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Q: Can you provide alternative for a nylon pan head screw? A:   Here the customer needed an alternative to nylon. Resistance to electrical fields was a primary concern. In addition, he also needed a material that had a better dissipation factor than nylon. In this situation we would recommend PEEK. It … Continue reading

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