5/8"‑11 Grade 5 Hex Jam Nut – Coarse Thread, Plain Finish

The 5/8"‑11 hex jam nut is manufactured from Grade 5 carbon steel to deliver dependable strength and durability in general‑purpose fastening applications. Featuring a coarse 11‑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. Supplied in a plain (uncoated) finish, this jam nut is ideal for machinery, automotive, maintenance, and industrial applications requiring secure locking and reliable performance.