5/16"-18 x 2‑1/2" Socket Head Cap Screw, Alloy Steel, Thermal Black Oxide (USA)

This USA‑made 5/16"-18 x 2‑1/2" socket head cap screw is manufactured from high‑strength alloy steel to provide dependable fastening in machinery, tooling, equipment assembly, and precision industrial applications. The thermal black oxide finish enhances corrosion resistance, improves lubricity, and delivers a consistent, low‑glare appearance while maintaining precise dimensional tolerances.Featuring a hex socket drive for secure torque transfer and a vibration‑resistant fit, this extended‑length fastener offers reliable performance in assemblies requiring added reach and strength. Its American‑made construction ensures clean, accurate threading, excellent durability, and long‑lasting stability in demanding environments.