5-40 x 1 1/2 Alloy Steel Button Head Socket Cap Screw supports compact fastening in assemblies where a cylindrical socket head would project farther from the surface. The alloy steel construction is selected for production equipment where a lower-profile head is preferred on exposed fastening points.

Designers often specify it for guards and access panels where maintenance crews can remove covers without extra external wrench clearance. It can also serve automation equipment and conveyor assemblies when the compact head profile helps protect nearby moving components. Unlike a standard socket head cap screw, the button head emphasizes a lower rounded profile and broader exposed head for applications that benefit from that geometry.

For drawings using the 5-40 thread and 1 1/2 in. length, the reference head diameter is 0.226-0.238 in. and the head height is 0.058-0.066 in. The nominal body diameter and hex-key information below support fit checks, tool access planning, and replacement verification.

Technical Highlights

• Material: Alloy Steel
• Thread Size: 5-40
• Length: 1 1/2 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.