4-40 x 2 1/2 Alloy Steel Socket Head Cap Screw provides a strength-focused alloy steel socket cap screw option for mechanical assemblies requiring this exact size. This size keeps the specified 4-40 thread and 2 1/2 in. length visible for replacement sourcing without changing the specified size. Selected for precision assemblies, production lines, and fixture design, it gives maintenance teams a searchable alloy steel socket screw callout. Alloy steel supports strength-focused fastening where clamp load and repeatable assembly are important. This keeps the listing focused on the fastener geometry rather than broad catalog language. Technical Highlights Material: Alloy Steel Thread: 4-40 Length: 2 1/2 in. Nominal Body Diameter: .112 in. Head Diameter: 0.176 in. min / 0.183 in. max Head Height: 0.108 in. min / 0.112 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.