6-40 x 7/16 Alloy Steel Button Head Socket Cap Screw gives equipment builders a rounded button-head form for visible or frequently handled fastening points. The alloy steel construction fits fixture construction where a broader bearing surface and socket-drive access are part of the design.

This configuration is practical for robotics and packaging machinery where internal hex drive access supports repeatable assembly work in tight spaces. It also works in precision assemblies and repair work when buyers can match the listed thread and length to drawings or service records. 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.

When matching the 6-40 thread and 7/16 in. length, the reference head diameter is 0.250-0.262 in. and the head height is 0.063-0.073 in. The nominal body diameter and hex-key information below help confirm fit, tool clearance, and replacement requirements.

Technical Highlights

• Material: Alloy Steel
• Thread Size: 6-40
• Length: 7/16 in.
• Nominal Body Diameter: #6 (.138 in.)
• Head Diameter: 0.250-0.262 in.
• Head Height: 0.063-0.073 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.