Self-Lock Pin

A self-lock pin is a removable fastener that locks itself in place when inserted, usually by a spring-loaded ball or a detent. It can be released by hand or with a simple tool.

A self-lock pin secures parts without a separate locking device. It often fits into a drilled hole and releases with a push or twist. Match it to the hole size and the load it holds.

Hot dip galvanising gives a thick zinc coating for outdoor or damp service. Plain finish is bare metal with no added coating. PTFE coating lowers friction and helps resist sticking.

This kind of pin is often made in stainless steel 304 or 316 for corrosion resistance, in steel for higher strength, or in brass for non-magnetic or decorative use.

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 and a mill test certificate for the material. On receipt, check the locking action, pin diameter and finish, and look for damage to the spring or ball.