3-56 x 3/8 Alloy Steel Socket Head Cap Screw helps maintenance and engineering teams source an alloy steel internal-hex screw with verified head-size data. The size callout supports bill-of-material consistency when drawn-to-print replacement work cannot accept a substitute fastener. Common uses include production lines, manufacturing plants, and machine tools, where internal hex installation helps keep the joint accessible. Socket engagement helps technicians apply installation torque from above the head in constrained layouts. The technical highlight block below retains the verified head diameter, head height, body diameter, and hex key data. Technical Highlights Material: Alloy Steel Thread: 3-56 Length: 3/8 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.