Tungsten Button Head Cap
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 screws are an ideal material for high temperature stability. Their extremely high melting point of 3420°C, makes tungsten button head 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 fasteners are also very corrosion resistant.
Tungsten button head socket cap 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. Fasteners can also be made from Commercially Pure (CP) Tungsten.
Applications
- The heat treating / furnace industry uses tungsten 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 button head socket cap 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: Flat Head Screws, Hex Head Cap Screws, Pan Head Screws, Set Screws, Socket Head Cap Screws
Tungsten Button Head Cap Screw Features & Benefits
Tungsten button head cap screws combine the similar shape of a pan head with the driver of a socket head. The socket driver is ideal for low clearance applications that require a large area clamping face. Compared to a standard socket head cap screw, tungsten button heads have a lower and wider profile. This can be useful when the clamping material is too thin to counter-bore.
Advantages
- Wide bearing surface for clamping
- Low profile head
Tungsten Chemistry & Specifications
Tungsten Specifications: ASTM B777, Mil Spec T-21014D
