1/2-20 x 2 1/4 Alloy Steel Socket Head Cap Screw gives engineers an internal-hex fastener for mechanical joints where socket engagement and dimensional consistency matter. This size keeps the specified 1/2-20 thread and 2 1/4 in. length visible for matching drawings and maintenance records. Selected for packaging machinery, maintenance repair, and fixture design, it gives maintenance teams a searchable alloy steel socket screw callout. Verified head dimensions and hex key size help engineering departments check fit before ordering. The combination of product name, size, material, and verified head data improves search clarity for engineers and buyers. Technical Highlights Material: Alloy Steel Thread: 1/2-20 Length: 2 1/4 in. Nominal Body Diameter: .500 in. Head Diameter: 0.735 in. min / 0.750 in. max Head Height: 0.492 in. min / 0.500 in. max Hex Key Size: 3/8 Drive Type: Internal hex socket Call 773-775-7900 or email Sales@coldheaders.com for pricing, availability, or a quote.