1/4-20 x 5 1/2 Alloy Steel Socket Head Cap Screw is specified when a machine assembly needs a high-strength alloy steel socket screw with predictable head and drive geometry. The size callout supports repair work tied to an existing fastener callout when tooling plates cannot accept a substitute fastener. Common uses include assembly equipment, manufacturing cells, and fixture design, where internal hex installation helps keep the joint accessible. The socket head form provides a cylindrical head suited to counterbores and recessed mounting pockets. The result is a clear alloy steel socket head cap screw listing for purchasing review and procurement. Technical Highlights Material: Alloy Steel Thread: 1/4-20 Length: 5 1/2 in. Nominal Body Diameter: .250 in. Head Diameter: 0.365 in. min / 0.375 in. max Head Height: 0.244 in. min / 0.250 in. max Hex Key Size: 3/16 Drive Type: Internal hex socket Call 773-775-7900 or email Sales@coldheaders.com for pricing, availability, or a quote.