3/8-16 Keysert® Heavy-Duty Locking Thread Insert, Stainless Steel, 5/Pack

Offer a solution for repairing stripped, damaged, or worn threads, as well as reinforcing threads in softer parent materials. This is especially beneficial in scenarios where the fastener will be frequently removed. They establish robust, permanent threads in a wide range of materials—whether ferrous, non-ferrous, or non-metallic. During installation, the inserts' locking keys embed into the tapped threads of the base material, forming a secure mechanical lock that effectively prevents rotation caused by vibration or torsion. Designed with an external thread configuration, they maximize pull-out resistance while maintaining a compact outer diameter.