General-purpose steel alloy for strength, temperature & wear

• 

  Nearly double the yield strength of 300 series stainless
• Maintains mechanical properties across wide temperature range
• Good toughness and impact resistance
• Nitronic 50 and 60 chemistry & specifications
• Datasheets for Nitronic 50 and Nitronic 60
• Nitronic fastener styles
• Lead time and availability

Nitronic is a high strength austenitic steel alloy that was designed for high temperature use. It offers good high temperature properties as well as good low-temperature impact resistance. In addition, Nitronic bolts also offer nearly double the yield strength of 300 series stainless steel. Nitronic fasteners are available in two alloy variations, Nitronic 50 and Nitronic 60, each offering different niche capabilities.

Nitronic 50: Corrosion Resistance & Strength
Nitronic 50 (1.3964; also known as N-50 and XM-19) fasteners offers reasonable corrosion resistance and a good combination of strength, ductility, and toughness, across a wide range of temperatures from extreme heat to cryogenic. Due to Nitronic 50 fasteners improved corrosion resistance compared to 316 and 317 stainless and good mechanical strength, they are often used in marine applications, pump shafts, petrochemical and pulp & paper applications. Perhaps their most unique characteristic is their low magnetic permeability.  This attribute allows Nitronic 50 screws to be used for medical implants.

Nitronic 60: Wear & Oxidation Resistance
Nitronic 60 is known for its good resistance to wear, fretting, and galling even at elevated temperatures. Nitronic 60 bolts are typically chosen for these attributes as an economic alternative compared to high cost cobalt-bearing and nickel alloys. In terms of oxidation resistance, Nitronic 60 is comparable to that of 309 stainless steel. At high temperatures, Nitronic 60 bolts exhibit carburization resistance superior to both 316L and 309. General corrosion resistance of Nitronic 60 falls between that of 304 and 316SS. Nitronic 60 bolts are often used in chemical processing, bridges and infrastructure, and aerospace applications.

Resources: Flange Dimensions, Flange Bolting Chart

Nitronic Fastener Availability

Availability
Nitronic fasteners are available in two grades, Nitronic 50 and Nitronic 60. Extreme Bolt & Fastener offers a diversity of Nitronic fastener products, most with a minimum order quantity of about 20 pieces per line item. The normal lead time is around 3-4 weeks, depending on the quantity and complexity. 

• Diameter sizes:  Standard #00 – 4” in diameter / Metric M1.2 – M48
• Threads: UNC, UNF, UNJ, UNR, Rolled,Cut
• Custom to print available.
• NACE MR0175, ASTM, ASME, MIL specifications, DFAR and Domestic available

Expediting Options
Many applications have immediate needs and we're here to help. If you require expedited delivery, please let us know when you request a quote so that we can try to accomodate your time frame.

Nitronic Fastener Styles

Nitronic (1.3964) Chemistry & Specifications

Nitronic 50 Specifications: ASTM A479, UNS S20910, AMS 5848 (bar), W. Nr./EN: 1.3964

Nitronic 60 Specifications: ASTM A479, UNS S21800

Nitronic Temperature vs. Wear Resistance

Nitronic Screws  

12 Point Screws	Nitronic 12 point screws offer improved torque over socket heads, but they are be less economical and require a higher minimum quantity due to production complexity. Nitronic 12 point screws are available in diameters 1/4" or larger.	•  IFI-115 •  MIL SPEC •  DIN 34822 •  DIN 34821
Button Head Cap Screws	When a low profile fastener with wide clamping area is required, we recommend Nitronic button head cap screws. Button head screws are often used for fastening a material that is too thin to counter bore.	• ASME B18.3 • ASME 18.3.4M • DIN 7380 / ISO 7380
Flat Head Screws	Nitronic flat head screws have a standard 82° countersink angle, but can also be customerized to other angles from 60° -120°. Flat heads are designed to be flush with the surface and can be made with a slotted and socket drivers. Phillips, torx and tamperproof drivers are also available.	•  ASME B18.3 •  ASME B18.3.6 •  DIN 963 / ISO 2009 •  DIN 965 / ISO 7046 •  DIN 7991 / ISO 10642
Hex Head Cap Screws	Nitronic hex head cap screws are used for high clamping force and easy access. They have a washer face under the head that isn't part of a hex head bolt. This face provides tighter dimensional tolerances.	• ASME B18.6.3 • DIN 931 / ISO 4014 • DIN 933 / ISO 4017 • DIN 961 / ISO 8676
Pan Head Screws	Nitronic pan head screws have rounded heads and typically feature a slotted driver. They best serve low torque applications that require small diameter fasteners.	• ASME B18.6.3 • DIN 7985 • DIN 921 • DIN 85 / ISO 1580 • DIN 84 / ISO 1207   (cheese head) • DIN 966 / ISO 7047   (raised counter sunk)
Security Screws	Nitronic security screws provide a solution to unwanted tampering because they cannot be removed with a standard driver. Nitronic tamper-proof screws can be made in a wide variety of driver styles, as well as custom per print.
Set Screws	Nitronic set screws are a headless fastener. They have a slotted or socket driver on one end and a special point on the other. We offer Nitronic set screws in cup, cone, flat, dog and half-dog points.	• ASME B18.3 • DIN 913 / ISO 4026 • DIN 914 / ISO 4027 • DIN 915 / ISO 4028 • DIN 916 / ISO 4029
Socket Head Cap Screws	Nitronic socket head cap screws are a secure fastening solution when there is little clearance.	• ASME B18.3 • DIN 912 / ISO 4762 • DIN 7984
Vented Screws	Nitronic vented screw provide sensitive vacuum applications a way to outgas contaminents. They feature a hole that is bored from head through shaft for outgasing. Nitronic vented screws can be made with most any head style.

Nitronic Bolts 

Hex Head Bolts	Nitronic hex head bolts are like hex head cap screw except they don't have a washer face. Nitronic hex bolts are ideal for high clamping force with easy access.	• ASME B18.2.1 • DIN 931 / ISO 4014 • DIN 933 / ISO 4017
Shoulder Bolts	Nitronic shoulder bolts consist of a head, smooth shoulder section, and threaded shaft. The shoulder portion is meant for rotating parts. Nitronic shoulder bolts typically have socket drivers.	• ASME • DIN 7379 / ISO 7379 • ISO 7370

Nitronic Nuts 

Hex Nuts	Nitronic hex nuts are available in these styles: finished hex nuts, jam nuts and heavy hex nuts.	• ASME B18.16.3 • ASME B18.2.2 • DIN 439 / ISO 4035 • DIN 934 / ISO 4032 • DIN 986
Lock Nuts	Two types of Nitronic lock nuts are available: all-metal (stover, flexloc, etc.) and polymer (nylon) insert styles. Nitronic all-metal lock nuts are idea for high temperatures and even load distribution. For applications with temperatures under 350°F, Nitronic nylon insert lock nuts are an economic solution.	• ASME B18.16.3M • DIN 980 / ISO 7042 /     ISO 19513 • DIN 6923 / ISO 4161 • DIN 985 / ISO 10511 /   ISO 7040

Nitronic Studs & Threaded Rod 

Studs	Nitronic studs are fully-threaded or partially-threaded rods less 12" long. These are available in any custom length under a foot long.	• ASME B18.31.2 • DIN 976
Threaded Rod	Nitronic threaded rods come in lengths greater than 1 foot (12") long. The minimum order quantity for threaded rod is 6 feet, which can be one 6ft rod; two 3ft rods; six 1ft rods, etc. Maximum shipment length is 6 feet.	• ASME B1.1 • DIN 975

Nitronic Washers 

Flat Washers	Nitronic washers are offered in SAE, DIN, USS, MilSpec, oversized, and custom sizes.	• ASME 18.21.1 • SAE / USS • DIN 125 / ISO 7089 /   ISO 7090 • DIN 126 / ISO 7091
Lock Washers	Nitronic lock washers are made in the split lock washer style.	• ASME B18.21.1 • DIN 127 / ISO 7090 • DIN 6796 /  ISO 10690