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

This USA‑made 5/16"-18 x 1‑1/2" socket head cap screw is manufactured from high‑strength alloy steel to deliver reliable, long‑lasting fastening performance in machinery, tooling, equipment assembly, and precision industrial applications. The thermal black oxide finish enhances corrosion resistance, increases lubricity, and provides a uniform, low‑glare appearance while preserving exact dimensional tolerances.Designed with a hex socket drive for secure torque transfer and a tight, vibration‑resistant fit, this fastener is ideal for demanding assemblies where strength and precision matter. Its American‑made construction ensures clean, consistent threading, excellent durability, and dependable performance in high‑stress environments.