Ultra-high density & high temperature / strength stability

• High strength at extreme high temperatures (vacuum)
• Radiopaque to x-rays and other radiation
• Very high density of 19.3 gm/cc
• Excellent corrosion resistance
• Mechanical properties of tungsten screws
• Tungsten material datasheet

Tungsten pan head screws are an ideal material for high temperature stability. Their extremely high melting point of 3420°C, makes tungsten screws useful for some of the hottest vacuum furnace environments. Another attribute of tungsten is its extreme high density. The high mass of tungsten screws make them radiopaque, allowing them to block radiation and show up well on x-rays – even better than lead. In addition, their high density also makes them ideal for balancing rotating parts. Beyond their high mass and temperature stability, tungsten pan head screws are also very corrosion resistant.

Tungsten screws are usually made from tungsten alloys per ASTM B777, and range from 90% to 97% pure tungsten, alloyed with nickel and copper or nickel and iron. Pan head screws can also be made from Commercially Pure (CP) Tungsten.

Applications

• The heat treating / furnace industry uses tungsten pan head screws in high temperature vacuum furnaces due to tungstens great high temperature strength & stability.
• The oil & gas industry uses tungsten screws for radiation shielding properties to protect equipment used in oil and gas detection, as well as down hole logging for density and ability to withstand intense hydrostatic pressure
• Tungsten pan head screws also play a role in the medical community for their low magnetic properties as well as their radiopaque properties.
• The aerospace industry depends on the tungsten screws for their combination of high density and mechanical strength which allows them to reduce the physical size of components, offering greater control of weight distribution for propellers, inertial systems and fluid control systems to name a few.

Resources: Tungsten Torque Specs

Tungsten Screw Types: Button Head Cap Screws, Flat Head Screws, Hex Head Cap Screws, Pan Head, Set Screws, Socket Head Cap Screws, Tamper Resistant Security Screws

Tungsten Pan Head Screw Features and Benefits

Pan head screws are flat on top and rounded on the sides. Tungsten pan head screws are ideal for:
•  Small diameter fasteners – especially when the fastener size needed is too small for a wrench.
•  When phillips or slotted drivers are desired. For many high strength specialty alloys, only slotted drives are available.
•  Low torque applications because the drivers don’t offer as much force as a wrench.
•  Large diameter head provides more clamping area.

How Are They Different from Button Head Screws?
Tungsten pan head and button head screws have very similar profiles however, button head screws allow for a hex socket driver whereas pan head screws do not.

Tungsten Chemistry & Specifications

Tungsten Specifications: ASTM B777, Mil Spec T-21014D