Screw locking insert is designed to provide a screw-locking feature which will retain screws or bolts under the most severe vibration or varying temperatue conditions. In addition to the benefits afforded by free running inserts, GRIPCOIL screw locking inserts offer the additional security of prevailing locking torque.

As the bolt is wound through the locking chords of the insert it deflects the wire.This deflection causes the insert to push against the bolt resulting in a repeatable locking function from the insert.