5/8"-18 x 1‑1/4" Socket Head Cap Screw, Alloy Steel, Thermal Black Oxide (USA)

This USA‑made 5/8"-18 x 1‑1/4" socket head cap screw is manufactured from high‑strength alloy steel to deliver precise, reliable fastening in machinery, tooling, precision equipment, and fine‑thread industrial assemblies. The thermal black oxide finish enhances corrosion resistance, increases lubricity, and provides a clean, uniform, low‑glare appearance while maintaining strict dimensional tolerances.Featuring a precision hex socket drive for secure torque transfer and a stable, vibration‑resistant fit, this fine‑thread fastener is ideal for applications requiring strong thread engagement, accurate alignment, and long‑term durability. Its American‑made construction ensures clean, consistent threading, excellent mechanical strength, and dependable performance even in demanding operating environments.