4-40 x 3/8 18-8 Stainless Steel Socket Head Cap Screw is selected for general manufacturing work where 18-8 stainless steel offers a practical balance of appearance and corrosion resistance. Engineers often choose 18-8 stainless where clean appearance, moderate environmental exposure, and general manufacturing compatibility matter. The cylindrical socket head works well in counterbored or recessed locations where side access is restricted. Typical placements include conveyor equipment, assembly systems, and replacement hardware where general corrosion resistance and internal-hex access are useful. Manufacturing facilities can standardize this size where corrosion-resistant socket-drive hardware is required. Technical Highlights: Material: 18-8 Stainless Steel; Thread: 4-40 UNC; Length: 3/8 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.