[100 PKG] Socket Head Cap Screws Alloy Steel Thermal Black Oxide 5-40 X 5/8

Socket Head Cap Screws built from alloy steel with a thermal black oxide finish. This combination delivers high strength, improved wear resistance, and a stealthy, low-reflection appearance for precision applications.

Designed for tight spaces and high-torque needs, the 5-40 thread size and 5/8 inch length make these fasteners ideal for machine assemblies, automotive projects, and electronics enclosures requiring reliable clamping.

Key features

• Material: Alloy Steel
• Finish: Thermal Black Oxide
• Head style: Socket Head Cap Screw
• Drive type: Hex Socket (Allen)
• Thread size: 5-40
• Length: 5/8 in
• Applications: High-torque assemblies in automotive, machinery, and equipment

Installation tips

Use a compatible hex key to achieve the correct torque. Ensure the mating threads are clean and properly aligned to maximize clamping force and avoid cross-threading.