5/16-18 x 1 1/4 Brass Socket Head Cap Screw is useful where a size-specific brass socket screw must match existing documentation without changing the material callout. The brass material is appropriate for compatible low-strength joints where conductivity and appearance are design considerations. Hex-key installation helps technicians reach fastening points inside covers, panels, brackets, fixtures, and housings. Typical placements include commercial hardware, display fixtures, and access panels where brass material properties and socket access are useful. Engineering departments can evaluate head clearance, drive access, and brass material compatibility before releasing the assembly. Technical Highlights: Material: Brass; Thread: 5/16-18 UNC; Length: 1 1/4 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.