1/2"‑13 Grade 5 Hex Jam Nut – Coarse Thread, Zinc CR+3 Finish

The 1/2"‑13 hex jam nut is manufactured from Grade 5 carbon steel to provide dependable strength and durability for general‑purpose fastening applications. Featuring a coarse 13‑TPI thread and a thin jam‑nut profile, it is designed to be used as a locking nut against a standard hex nut or in space‑restricted assemblies to help prevent loosening under vibration. Finished with a Zinc CR+3 coating for improved corrosion resistance, this jam nut is ideal for machinery, automotive, maintenance, and industrial applications requiring secure locking and reliable performance.