6-40 x 1/8 Alloy Steel Socket Head Cap Screw supports industrial fastening where the socket head, internal hex drive, and verified head dimensions help match existing designs. The size callout supports matching drawings and maintenance records when drive components cannot accept a substitute fastener. Applications often include manufacturing cells, engineering departments, and material handling, especially where counterbored or close-clearance mounting is required. The socket head form provides a cylindrical head suited to counterbores and recessed mounting pockets. The combination of product name, size, material, and verified head data improves search clarity for engineers and buyers. Technical Highlights Material: Alloy Steel Thread: 6-40 Length: 1/8 in. Nominal Body Diameter: .138 in. Head Diameter: 0.218 in. min / 0.226 in. max Head Height: 0.134 in. min / 0.138 in. max Hex Key Size: 7/64 Drive Type: Internal hex socket Call 773-775-7900 or email Sales@coldheaders.com for pricing, availability, or a quote.