M5‑0.80 DIN 439B Hex Jam Nut – Class 04, Coarse Thread, Plain Finish

M5‑0.80 hex jam nut manufactured to DIN 439B specifications from Class 04 steel, providing reliable strength and dimensional consistency for metric fastening applications. Featuring a coarse 0.80 mm thread pitch 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 resist loosening. Supplied in a plain (uncoated) finish, this jam nut is well suited for machinery, equipment assembly, maintenance, and general industrial applications where secure locking and dependable performance are required.