5-40 x 3/4 18-8 Stainless Steel Button Head Socket Cap Screw helps engineers combine reduced head projection, internal hex drive access, and 18-8 stainless steel performance in one fastener. This head style is distinct from flat head, low head, pan head, and standard socket head cap screw geometry. The internal hex drive supports socket-key installation where external wrenching space is limited.

Typical applications include control enclosures and service panels, where the smooth exposed appearance is useful when hardware remains visible after assembly. It can also serve brackets, fixtures, and precision assemblies, where the broad bearing surface can help seat the head cleanly on light mounting surfaces. The rounded head profile is useful on visible or frequently handled assemblies.

For routine washdown or cleaning applications, 18-8 stainless can provide a practical balance of appearance and corrosion resistance. For the 5-40 thread and 3/4 in. length, the reference head diameter is 0.226-0.238 in. and the head height is 0.058-0.066 in.

Technical Highlights

• Material: 18-8 Stainless Steel
• Thread Size: 5-40
• Length: 3/4 in.
• Nominal Body Diameter: #5 (.125 in.)
• Head Diameter: 0.226-0.238 in.
• Head Height: 0.058-0.066 in.
• Hex-Key Size: 5/64 in.
• Drive Type: Internal Hex

Reference dimensions may vary slightly by manufacturer.

Call 773-775-7900 or email Sales@coldheaders.com for pricing, availability, or a quote.