5/16"-18 x 7/8" Socket Head Cap Screw, Alloy Steel, Thermal Black Oxide (USA)

This USA‑made 5/16"-18 x 7/8" socket head cap screw is manufactured from high‑strength alloy steel to deliver reliable performance in machinery, tooling, equipment assembly, and industrial applications. The thermal black oxide finish enhances corrosion resistance, improves lubricity, and provides a uniform, low‑glare appearance while maintaining precise dimensional tolerances.Featuring a hex socket drive for secure torque transfer and a tight, vibration‑resistant fit, this fastener is ideal for applications requiring strength, accuracy, and clean assembly. Its American‑made construction ensures consistent threading, excellent durability, and dependable fastening performance in demanding environments.