5-40 x 2 3/4 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 size callout supports service work where the exact thread and length are already defined when socket-drive service locations cannot accept a substitute fastener. Industrial buyers may specify it for processing equipment, automation systems, and power transmission where head geometry and drive access need to be predictable. Alloy steel supports strength-focused fastening where clamp load and repeatable assembly are important. The combination of product name, size, material, and verified head data improves search clarity for engineers and buyers. Technical Highlights Material: Alloy Steel Thread: 5-40 Length: 2 3/4 in. Nominal Body Diameter: .125 in. Head Diameter: 0.198 in. min / 0.205 in. max Head Height: 0.121 in. min / 0.125 in. max Hex Key Size: 3/32 Drive Type: Internal hex socket Call 773-775-7900 or email Sales@coldheaders.com for pricing, availability, or a quote.