1 1/2-6 x 5 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 1 1/2-6 thread and 5 1/2 in. length support repair work tied to an existing fastener callout in machine frames and brackets. Applications often include manufacturing plants, tooling, and machine tools, especially where counterbored or close-clearance mounting is required. 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: 1 1/2-6 Length: 5 1/2 in. Nominal Body Diameter: 1.500 in. Head Diameter: 2.224 in. min / 2.250 in. max Head Height: 1.485 in. min / 1.500 in. max Hex Key Size: 1 Drive Type: Internal hex socket Call 773-775-7900 or email Sales@coldheaders.com for pricing, availability, or a quote.