6-40 x 3/16 Alloy Steel Button Head Socket Cap Screw fits applications where engineers want socket drive control in a rounded head rather than an external wrenching feature. The alloy steel construction is appropriate for tooling applications that require a smooth exposed appearance with internal hex engagement.

Frequent uses include control enclosures and equipment housings where the rounded head reduces sharp edges on handled surfaces. It is also practical in robotics and packaging machinery when internal hex drive access supports repeatable assembly work in tight spaces. This head style is different from a standard socket head cap screw: it trades the taller cylindrical head form for a rounded button profile used on exposed assemblies.

For assemblies specified with 6-40 thread and 3/16 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 maintenance and purchasing teams verify fit and tool access.

Technical Highlights

• Material: Alloy Steel
• Thread Size: 6-40
• Length: 3/16 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.