1-8 x 4 Alloy Steel Socket Head Cap Screw provides a strength-focused alloy steel socket cap screw option for mechanical assemblies requiring this exact size. With a 1-8 thread and 4 in. length, it fits drawn-to-print replacement work where size interchangeability matters. The screw is useful across production lines, industrial facilities, and material handling when a compact internal-hex fastener is required. Socket engagement helps technicians apply installation torque from above the head in constrained layouts. This exact size supports industrial hardware, repair, and production requirements. Technical Highlights Material: Alloy Steel Thread: 1-8 Length: 4 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.