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 7035-01-317-4227
NSN 6130-01-157-8094
NSN 5930-01-363-5271
NSN 5920-01-415-2878
NSN 2925-01-057-6993
NSN 5960-01-323-0024
NSN 6135-01-177-3552
NSN 4140-01-241-7870
NSN 5985-00-277-4230
NSN 5999-00-169-9153
NSN 6685-01-502-8678
NSN 6320-00-925-0558