Pal Nut

A pal nut is a thin locknut with a spring-like action that grips a bolt or shaft. It is used to lock a nut or to hold a part on a threaded stud.

A pal nut is a thin spring steel locknut that threads onto a bolt after a plain nut to stop it loosening. It is often matched with a standard nut and bolt of the same thread. The nut is pressed or spun on and its arched form grips the thread, so it suits light assemblies rather than high load joints.

Hot-dipped galvanising gives a thick zinc coating for outdoor use. PTFE coating reduces friction and gives some corrosion resistance. Plain finish has no coating and is for dry conditions.

Pal nuts are often made in steel, stainless steel, stainless steel 304, stainless steel 316, or brass. Stainless steel grades resist corrosion, while brass gives good conductivity.

This is a general guide to checking this kind of part. It says nothing about any supplier's parts.

Ask for a certificate of conformance for the material and thread size. On receipt, check the thread form and that the nut grips the bolt without stripping.