4-40 x 5/8 Brass Socket Head Cap Screw is commonly used when drawings call for a socket head cap screw in brass rather than alloy steel or stainless steel. Brass provides general corrosion resistance in many indoor environments while also supporting commercial and decorative hardware requirements. The drive style supports controlled removal and reinstallation during maintenance, adjustment, or instrument service. Typical placements include lighting equipment, commercial fixtures, and architectural hardware where brass material properties and socket access are useful. Maintenance teams can match the thread, length, material, and head geometry already specified on service documentation. Technical Highlights: Material: Brass; 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.