3-48 x 1/8 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 exact 3-48 x 1/8 size helps buyers align the fastener with stockroom identification and purchasing review. Common uses include tooling, manufacturing cells, and machine tools, where internal hex installation helps keep the joint accessible. Internal hex drive access helps installation in compact assemblies, guards, housings, and fixture plates. Those verified dimensions support counterbore checks, tool selection, and replacement fastener review. Technical Highlights Material: Alloy Steel Thread: 3-48 Length: 1/8 in. Nominal Body Diameter: .099 in. Head Diameter: 0.154 in. min / 0.161 in. max Head Height: 0.095 in. min / 0.099 in. max Hex Key Size: 5/64 Drive Type: Internal hex socket Call 773-775-7900 or email Sales@coldheaders.com for pricing, availability, or a quote.