Hex Jam Nuts Steel Zinc Yellow 5/8-18 deliver reliable locking for fastener assemblies with a compact, low-profile design. Crafted from high-strength steel and finished in a durable zinc yellow coating, these jam nuts resist corrosion and vibration, helping your equipment stay secure in demanding environments.

Designed to tighten against another nut or surface, hex jam nuts provide a simple, effective locking solution for automotive, machinery, and construction projects. The 5/8-18 size refers to a UNC coarse thread, ensuring compatibility with standard bolts and studs.

Key features

• Size & thread: 5/8-18 UNC
• Material: Steel
• Finish: Zinc Yellow (zinc plating with yellow chromate)
• Style: Hex jam nut for compact locking
• Application: Locks standard nuts on bolts, studs, or threaded rods
• Environment: Suitable for indoor or outdoor use with good corrosion resistance

Why choose zinc yellow finish?

• Excellent corrosion resistance and long service life
• High visibility yellow chromate coating for easy identification

Installation tips

• Place the jam nut against the mating nut or surface, then tighten with a wrench until snug and secure.
• A light torque is often sufficient; avoid over-tightening to prevent thread damage.
• Use in tandem with a standard nut for a reliable lock in vibrating assemblies.

With its durable steel construction and protective zinc yellow finish, these hex jam nuts are a trusted choice for quick, effective locking in automotive, industrial, and DIY projects.