4-40 x 5/8 18-8 Stainless Steel Socket Head Cap Screw is commonly used when a size-specific stainless socket cap screw must match the thread and length called out on existing documentation. This material is useful across production facilities where moisture, handling, and routine cleaning influence fastener selection. Internal-hex engagement gives engineering departments a familiar drive style for stainless machine components. Typical placements include material handling, conveyor systems, and service brackets where general corrosion resistance and internal-hex access are useful. Purchasing agents can source the specified stainless fastener without changing the approved product family. Technical Highlights: Material: 18-8 Stainless Steel; Thread: 4-40 UNC; Length: 5/8 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.