Cap Screws Flat Socket Alloy Thermal Black Oxide 5/16-18 X 1 1/4 are high-strength fasteners designed for secure, precise assemblies. Featuring a flat socket head and an alloy body, these screws are finished with a durable thermal black oxide for a clean appearance and improved corrosion resistance.

• Head style: Flat Socket
• Material: Alloy
• Finish: Thermal Black Oxide
• Thread size: 5/16-18
• Length: 1 1/4 in
• Type: Cap Screws (Flat Socket Head)

These cap screws are ideal for applications requiring a low-profile, flush seating with reliable torque retention. The 5/16-18 UNC threading is widely compatible with corresponding nuts and tapped holes, making them versatile for automotive, machinery, and industrial equipment projects. The alloy construction delivers strength and durability, while the thermal black oxide finish provides a professional look and added protection in demanding environments.