1/2"-13 x 4" Socket Head Cap Screw, Alloy Steel, Thermal Black Oxide (USA)

This USA‑made 1/2"-13 x 4" socket head cap screw is engineered from high‑strength alloy steel to deliver exceptional fastening performance in heavy machinery, tooling, structural assemblies, and demanding industrial environments. The thermal black oxide finish enhances corrosion resistance, improves lubricity, and provides a smooth, uniform, low‑glare appearance while maintaining precise dimensional accuracy.Featuring a hex socket drive for superior torque transfer and a secure, vibration‑resistant fit, this extra‑long fastener is ideal for assemblies requiring extended reach, high load capacity, and precise alignment. Its American‑made construction ensures clean, consistent threading, outstanding durability, and dependable long‑term performance under tough operating conditions.