5/16-18 x 1 1/4 18-8 Stainless Steel Button Head Socket Cap Screw fits assemblies where reduced head projection and a smooth exposed appearance help protect nearby components or operators. 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 instrumentation and commercial equipment, where the stainless material provides a clean look for visible or frequently handled hardware. It can also serve machine covers and equipment housings, where internal hex access supports installation where external wrench clearance is limited. 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 5/16-18 thread and 1 1/4 in. length, the reference head diameter is 0.527-0.547 in. and the head height is 0.152-0.166 in.

Technical Highlights

• Material: 18-8 Stainless Steel
• Thread Size: 5/16-18
• Length: 1 1/4 in.
• Nominal Body Diameter: 5/16 (.312 in.)
• Head Diameter: 0.527-0.547 in.
• Head Height: 0.152-0.166 in.
• Hex-Key Size: 3/16 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.