5/16"-18x1 3/4" SOCKET HEAD CAP SCREWS, THERMAL BLACK OXIDE, ALLOY (USA)

This USA‑made 5/16"-18 x 1‑3/4" socket head cap screw is crafted from high‑strength alloy steel to deliver reliable fastening performance in machinery, fabrication, tooling, and precision industrial equipment. The thermal black oxide coating enhances corrosion resistance, improves lubricity, and creates a uniform, low‑glare finish while maintaining exact dimensional accuracy.The hex socket drive provides secure torque transfer and a tight, vibration‑resistant fit, making this fastener ideal for demanding assemblies where strength and stability are essential. With consistent American‑made quality, this screw offers clean threading, excellent durability, and dependable long‑term performance in high‑stress environments.