4-40 x 1 Alloy Steel Socket Head Cap Screw is a socket head cap screw for buyers matching an exact thread and length to drawings, repair records, or stocked hardware. The exact 4-40 x 1 size helps buyers align the fastener with repair work tied to an existing fastener callout. It is frequently used in manufacturing plants, assembly equipment, and maintenance repair when socket engagement is preferred over external-wrench access. Verified head dimensions and hex key size help engineering departments check fit before ordering. This exact size supports industrial hardware, repair, and production requirements. Technical Highlights Material: Alloy Steel Thread: 4-40 Length: 1 in. Nominal Body Diameter: .112 in. Head Diameter: 0.176 in. min / 0.183 in. max Head Height: 0.108 in. min / 0.112 in. max Hex Key Size: 3/32 Drive Type: Internal hex socket Call 773-775-7900 or email Sales@coldheaders.com for pricing, availability, or a quote.