5-40 x 1/4 Alloy Steel Flat Head Socket Cap Screw is built for 82-degree countersunk fastening where the installed head needs to sit even with the surrounding surface. The flat-head profile is particularly useful around moving stock, operator contact areas, and assemblies where exposed screw heads should not project.

It fits panel installations, service covers, bracket assemblies, and precision machinery where maintenance access and surface clearance both matter. The alloy steel material keeps the product aligned with machine-building, tooling, and industrial repair requirements that specify this fastener family. The internal hex drive supports top-side socket engagement where side access is limited.

For this 5-40 thread and 1/4 in. length, the verified head data helps engineers compare countersink depth, head clearance, and tooling access. Cold Headers supports purchasing teams and engineering departments that need clear size identification for specialty socket screw requirements.

Technical Highlights

• Material: Alloy Steel
• Thread Size: 5-40
• Length: 1/4 in.
• Nominal Body Diameter (B): 0.125 in.
• Head Diameter (A): 0.240-0.281 in.
• Head Height: 0.090 in.
• Hex Socket Size (J): 5/64 in.
• Drive Type: Internal Hex

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