1/2"‑13 Grade 5 Hex Jam Nut – Coarse Thread, Plain Finish

The 1/2"‑13 hex jam nut is manufactured from Grade 5 carbon steel to provide dependable strength and durability in general‑purpose fastening applications. Featuring a coarse 13‑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. Supplied in a plain (uncoated) finish, this jam nut is ideal for machinery, automotive, maintenance, and industrial applications requiring secure locking and reliable performance.