5/16-18 x 1 1/2 Alloy Steel Socket Head Cap Screw provides a strength-focused alloy steel socket cap screw option for mechanical assemblies requiring this exact size. The exact 5/16-18 x 1 1/2 size helps buyers align the fastener with matching drawings and maintenance records. The screw is useful across automation systems, packaging machinery, and robotics when a compact internal-hex fastener is required. Socket engagement helps technicians apply installation torque from above the head in constrained layouts. This keeps the listing focused on the fastener geometry rather than broad catalog language. Technical Highlights Material: Alloy Steel Thread: 5/16-18 Length: 1 1/2 in. Nominal Body Diameter: .312 in. Head Diameter: 0.457 in. min / 0.469 in. max Head Height: 0.306 in. min / 0.312 in. max Hex Key Size: 1/4 Drive Type: Internal hex socket Call 773-775-7900 or email Sales@coldheaders.com for pricing, availability, or a quote.