E-Z Lok 303-10-PK5 Heavy Wall Self Locking Thread Insert hardware

E-Z Lok 303-10-PK5 Thread Insert Pack

This E-Z Lok 303-10-PK5 kit supplies five heavy-wall self-locking thread inserts made from 18-8 stainless steel. They create a 5/8"-11 coarse internal thread inside a 7/8"-9 external thread for metal components. The plain finish suits general-purpose repair and reinforcement tasks. Installers drill a 49/64 inch hole to accept the insert.

Suits damaged-thread repair in metal

Mechanics and fabricators who need to restore stripped or worn 5/8"-11 threads in metal housings will find these inserts match the required dimensions. The self-locking design resists vibration loosening once installed. Buyers who want more inserts per package or a different internal thread size should look at other kits. The 7/8"-9 external thread limits use to holes tapped for that specific size.

7/8"-9 external thread with 5/8"-11 internal thread

The defining specification is the thread pair: a 7/8"-9 coarse external thread and a 5/8"-11 coarse internal thread, both right-hand. This combination decides whether the insert fits the existing tapped hole and accepts the intended fastener. Verify the host material can be drilled to 49/64 inch and tapped to 7/8"-9 before ordering. The minimum installation depth is 13/16 inch.