5/16"-18 Hex Jam Nut, Grade 8, Coarse Thread, Plain Finish

This 5/16"-18 hex jam nut is made from high‑strength Grade 8 steel for dependable locking in high‑load applications. Its thin profile and coarse thread make it ideal for tight‑space assemblies where vibration resistance is critical. The plain finish is suitable for dry, non‑corrosive automotive, industrial, and mechanical environments.