7/8"‑9 Grade 5 Hex Jam Nut – Coarse Thread, Zinc CR+3 Finish

The 7/8"‑9 hex jam nut is manufactured from Grade 5 carbon steel to provide dependable strength and durability for general‑purpose fastening applications. Featuring a coarse 9‑TPI thread and a thin jam‑nut profile, it is designed for use 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 enhanced corrosion resistance, this jam nut is ideal for machinery, automotive, maintenance, and industrial applications requiring secure locking and reliable performance.