5/8-18 x 2 Alloy Steel Socket Head Cap Screw is specified when a machine assembly needs a high-strength alloy steel socket screw with predictable head and drive geometry. The 5/8-18 thread and 2 in. length support replacement sourcing without changing the specified size in fixture clamps. Common uses include production lines, manufacturing plants, and robotics, where internal hex installation helps keep the joint accessible. Verified head dimensions and hex key size help engineering departments check fit before ordering. The result is a clear alloy steel socket head cap screw listing for purchasing review and procurement. Technical Highlights Material: Alloy Steel Thread: 5/8-18 Length: 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.