5-40 x 1 1/4 Alloy Steel Flat Head Socket Cap Screw gives engineers a socket-drive fastener for assemblies where surface projection has to be minimized. The flat-head profile is particularly useful around moving stock, operator contact areas, and assemblies where exposed screw heads should not project.

For fixture construction, machine covers, and production equipment, the 82-degree countersunk head helps avoid raised fastener edges without requiring external wrenching space. As an alloy steel socket fastener, it is selected for industrial assemblies that require a durable internal-hex screw where countersunk geometry and socket-drive access are important. The internal hex drive supports top-side socket engagement where side access is limited.

For this 5-40 thread and 1 1/4 in. length, the verified head data helps engineers compare countersink depth, head clearance, and tooling access. Cold Headers helps buyers match thread, length, and head style when replacement hardware must align with existing countersunk components.

Technical Highlights

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