Grainger Key Locking Insert: Heavy Wall, 4 Keys, M12x1.25 Int Thrd Sz, M18-1.50 Ext Thrd Sz

This heavy-wall key locking insert is used to repair or reinforce threaded holes in metal assemblies, particularly in aerospace and defense applications. It meets mil. spec. standards Fed Std. H28/21 and MJ Form, providing a secure, reusable thread in materials where standard threads may strip.

This insert has an M12x1.25 internal thread and M18-1.50 external thread, with a heavy wall, 4 keys, and plain finish. It is made from 18-8 stainless steel, requires a 16.70 mm drill bit and M18-1.50 tap, and meets Fed Std. H28/21 and MJ Form standards. Supplied in a 10-pack.

3G Electric supplies APPROVED VENDOR key locking inserts worldwide. As a global industrial solutions provider, we handle full logistics, customs clearance, and delivery to your facility. Contact us to order the 10-pack of heavy-wall inserts with M12x1.25 internal thread and M18-1.50 external thread.

Drill a 16.70 mm hole, tap it to M18-1.50 using a compatible tap, then thread the insert into the hole using a key locking insert tool. Ensure the keys align with the tapped slots to lock the insert in place. Follow standard mil. spec. installation practices for 18-8 stainless steel inserts.