1-8 x 1 1/2 Alloy Steel Socket Head Cap Screw is commonly used where an Allen-style socket drive is preferred over external-wrench hardware in confined equipment layouts. The size callout supports replacement sourcing without changing the specified size when tooling plates cannot accept a substitute fastener. Industrial buyers may specify it for production lines, robotics, and precision assemblies where head geometry and drive access need to be predictable. 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: 1-8 Length: 1 1/2 in. Nominal Body Diameter: 1.000 in. Head Diameter: 1.479 in. min / 1.500 in. max Head Height: 0.988 in. min / 1.000 in. max Hex Key Size: 3/4 Drive Type: Internal hex socket Call 773-775-7900 or email Sales@coldheaders.com for pricing, availability, or a quote.