1‑3/8"-6 Hex Jam Nut, Grade 8, Coarse Thread, Plain Finish

The 1‑3/8"-6 hex jam nut is manufactured from high‑strength Grade 8 steel to provide secure locking in heavy‑duty, high‑load applications. Its thin jam‑nut profile and coarse thread make it ideal for tight‑clearance assemblies where maximum strength and vibration resistance are required. The plain finish is best suited for dry, non‑corrosive industrial, automotive, and mechanical environments.