4-40 x 1 3/4 316 Stainless Socket Head Cap Screw is specified when a compact socket-head fastener must combine stainless corrosion resistance with dependable hex-key access. The material is appropriate for many salt-air, high-humidity, washdown, and chemical-adjacent service conditions. Hex-key installation helps technicians reach fastening points inside guards, covers, brackets, and fixtures. Typical placements include pharmaceutical equipment, cleaning zones, and controlled production rooms where stainless corrosion resistance and internal-hex access are practical. Engineering departments can evaluate head clearance, drive access, and material compatibility before releasing the assembly. Technical Highlights: Material: 316 Stainless Steel; Thread: 4-40 UNC; Length: 1 3/4 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.