5/8"-18 Hex Jam Nut, Grade 8, Fine Thread, Zinc Yellow Cr+6 Finish

The 5/8"-18 hex jam nut is manufactured from high‑strength Grade 8 steel to provide secure, reliable locking in precision, high‑load applications. Its fine thread offers increased holding power and more precise adjustment, while the thin jam‑nut profile makes it ideal for tight‑clearance or double‑nut assemblies. Finished with a zinc yellow Cr+6 coating, it delivers enhanced corrosion resistance and easy visual identification for automotive, industrial, and mechanical environments.