4-40 x 3/4 Alloy Steel Socket Head Cap Screw gives engineers an internal-hex fastener for mechanical joints where socket engagement and dimensional consistency matter. The exact 4-40 x 3/4 size helps buyers align the fastener with bill-of-material consistency. The screw is useful across machine tools, production lines, and fixture design when a compact internal-hex fastener is required. The dimensional highlights make the listing more useful for maintenance shops and industrial distribution teams. The combination of product name, size, material, and verified head data improves search clarity for engineers and buyers. Technical Highlights Material: Alloy Steel Thread: 4-40 Length: 3/4 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.