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 5999-01-198-8449
NSN 5835-01-416-6455
NSN 2925-01-577-0004
NSN 6320-01-600-0787
NSN 6135-00-284-1406
NSN 5996-01-633-7979
NSN 6220-01-051-6993
NSN 5855-01-528-7287
NSN 6220-01-326-2318
NSN 5925-00-244-0711
NSN 6240-00-705-7731
NSN 5930-00-616-1861