4-40 x 2 1/2 316 Stainless Socket Head Cap Screw is used where a drawing calls for 316 stainless material, socket-drive engagement, and a cylindrical head profile. 316 stainless is useful where a clean appearance and added resistance to chloride exposure are both important. The drive style is useful when repeated maintenance requires controlled removal and reinstallation. Typical placements include maintenance shops, replacement hardware, and industrial distribution where stainless corrosion resistance and internal-hex access are practical. Maintenance managers can match the thread, length, material, and head geometry already called out on service documentation. Technical Highlights: Material: 316 Stainless Steel; Thread: 4-40 UNC; Length: 2 1/2 in.; Nominal Body Diameter: 0.112 in.; Head Diameter: 0.183 in. max / 0.176 in. min; Head Height: 0.112 in. max / 0.108 in. min; Hex Key Size: 3/32; Drive Type: internal hex. Call 773-775-7900 or email Sales@coldheaders.com for pricing, availability, or a quote.