1 1/4-7 x 12 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. For drawn-to-print replacement work, the 1 1/4-7 thread and 12 in. length help confirm the correct socket cap screw before installation. It is frequently used in power transmission, maintenance repair, and assembly equipment when socket engagement is preferred over external-wrench access. Verified head dimensions and hex key size help engineering departments check fit before ordering. Those verified dimensions support counterbore checks, tool selection, and replacement fastener review. Technical Highlights Material: Alloy Steel Thread: 1 1/4-7 Length: 12 in. Nominal Body Diameter: 1.250 in. Head Diameter: 1.852 in. min / 1.875 in. max Head Height: 1.236 in. min / 1.250 in. max Hex Key Size: 7/8 Drive Type: Internal hex socket Call 773-775-7900 or email Sales@coldheaders.com for pricing, availability, or a quote.