1/2-20 x 8 1/2 Alloy Steel Socket Head Cap Screw is suited to assemblies that need an alloy steel cap screw for clamp load, service access, and compact installation. This size keeps the specified 1/2-20 thread and 8 1/2 in. length visible for service work where the exact thread and length are already defined. Common uses include manufacturing plants, machine tools, and power transmission, where internal hex installation helps keep the joint accessible. Internal hex drive access helps installation in compact assemblies, guards, housings, and fixture plates. The technical highlight block below retains the verified head diameter, head height, body diameter, and hex key data. Technical Highlights Material: Alloy Steel Thread: 1/2-20 Length: 8 1/2 in. Nominal Body Diameter: .500 in. Head Diameter: 0.735 in. min / 0.750 in. max Head Height: 0.492 in. min / 0.500 in. max Hex Key Size: 3/8 Drive Type: Internal hex socket Call 773-775-7900 or email Sales@coldheaders.com for pricing, availability, or a quote.