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 5920-01-415-0153
NSN 6105-01-252-1163
NSN 7035-01-394-3169
NSN 5935-01-303-5987
NSN 6620-01-278-8028
NSN 6135-01-396-4900
NSN 5935-01-257-2362
NSN 5975-01-465-4723
NSN 5950-01-152-1271
NSN 6645-00-200-2324
NSN 5950-01-633-9800
NSN 6110-01-181-4520