5/16"-18 x 3/4" Socket Head Cap Screw, Alloy Steel, Thermal Black Oxide (USA)

This USA‑made 5/16"-18 x 3/4" socket head cap screw is manufactured from high‑strength alloy steel and finished with a thermal black oxide coating for enhanced corrosion resistance and improved lubricity. The black oxide surface also reduces glare and maintains precise dimensional accuracy, making it ideal for precision assemblies.Designed with a hex socket drive for secure torque transfer, this fastener provides excellent holding strength and a vibration‑resistant fit. Its American‑made construction ensures consistent threading, reliable performance, and long‑lasting durability in machinery, tooling, equipment assembly, and industrial applications where quality and precision matter.