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 5920-01-146-4503
NSN 5835-01-149-6855
NSN 5960-00-384-2601
NSN 5950-01-168-8686
NSN 4140-01-555-3124
NSN 6650-01-084-7377
NSN 5999-01-443-9593
NSN 5990-00-269-2226
NSN 5990-01-359-8334
NSN 5935-01-345-8691
NSN 6240-00-232-7065
NSN 6220-01-567-4386