3/8"‑16 Grade 5 Hex Jam Nut – Coarse Thread, Plain Finish

The 3/8"‑16 hex jam nut is manufactured from Grade 5 carbon steel to provide reliable strength and durability in general‑purpose fastening applications. Featuring a coarse 16‑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‑limited 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 dependable performance.