A locking device with two keys spaced approximately 180 degrees center to center and protruding from the seating surface of the ring. When installed the keys mate with companion keyways in the external threads of screw thread inserts, locked-in studs, or similar type items, and cut through sufficient threads of the parent material tapped hole to provide a positive lock between the threaded bodies.
NSN 5935-01-547-8517
NSN 2925-01-137-4062
NSN 7035-01-411-6062
NSN 6145-00-069-0257
NSN 5925-01-356-8598
NSN 5895-01-619-9148
NSN 5985-00-495-3782
NSN 6135-01-293-3066
NSN 7035-00-238-3662
NSN 6135-01-026-9960
NSN 6150-00-435-3182
NSN 6645-00-262-7448