5-40 Button Head Socket Cap Screws

5-40 Button Head Socket Cap Screws
#5-40 button head socket cap screws in USS coarse (UNC) thread, made from heat treated alloy steel with a black oxide finish. We stock 1/4", 3/8", 1/2", 5/8", 3/4", 1" lengths. They take a 5/64" hex key. They are fully threaded.
Specifications
- Size: #5-40 (USS coarse)
- Lengths: 1/4", 3/8", 1/2", 5/8", 3/4", 1"
- Hex key: 5/64"
- Tap drill: #38
- Material: alloy steel, ASTM F835
- Finish: black oxide
- Strength: 145,000 psi minimum tensile strength (ASTM F835)

Common Uses
- Guards and covers
- Panels and enclosures
- Fixtures
FAQ
What hex key fits a #5-40 button head socket cap screw?
A 5/64" hex key (Allen wrench).
What tap drill do I use for #5-40?
Use a #38 drill for a standard 75% thread.
Are button head socket screws as strong as socket head cap screws?
No. Button and flat head socket cap screws are made to ASTM F835, with a minimum tensile strength of 145,000 psi in 1/2" and smaller and 135,000 psi over 1/2". Their smaller socket also takes less torque, so use a socket head cap screw for high loads.
Related: Stainless Button Head Socket Cap Screws | Hex Keys | All Button Head Socket Cap Screws USS Coarse
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