5/8-18 x 3 1/2 Alloy Steel Socket Head Cap Screw helps maintenance and engineering teams source an alloy steel internal-hex screw with verified head-size data. For repair inventories, the 5/8-18 thread and 3 1/2 in. length help confirm the correct socket cap screw before installation. Selected for robotics, industrial automation, and industrial facilities, it gives maintenance teams a searchable alloy steel socket screw callout. The socket head form provides a cylindrical head suited to counterbores and recessed mounting pockets. The technical highlight block below retains the verified head diameter, head height, body diameter, and hex key data. Technical Highlights Material: Alloy Steel Thread: 5/8-18 Length: 3 1/2 in. Nominal Body Diameter: .625 in. Head Diameter: 0.921 in. min / 0.938 in. max Head Height: 0.616 in. min / 0.625 in. max Hex Key Size: 1/2 Drive Type: Internal hex socket Call 773-775-7900 or email Sales@coldheaders.com for pricing, availability, or a quote.