5/16-24 x 2 1/2 18-8 Stainless Steel Socket Head Cap Screw provides an 18-8 stainless socket-drive option for assemblies that need reliable hex-key access in compact locations. The stainless construction supports service in many maintenance, assembly, agricultural, and light chemical exposure environments. The internal hex drive supports positive tool engagement where surrounding components limit wrench clearance. Typical placements include machine tools, fixture design, and engineering departments where general corrosion resistance and internal-hex access are useful. Design engineers can compare the listed head dimensions and hex key size against counterbore and tooling requirements. Technical Highlights: Material: 18-8 Stainless Steel; Thread: 5/16-24 UNF; Length: 2 1/2 in.; Nominal Body Diameter: 0.312 in.; Head Diameter: 0.469 in. max / 0.457 in. min; Head Height: 0.312 in. max / 0.306 in. min; Hex Key Size: 1/4; Drive Type: internal hex. Call 773-775-7900 or email Sales@coldheaders.com for pricing, availability, or a quote.