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 2925-01-603-6379
NSN 6110-01-502-0665
NSN 5895-00-395-2657
NSN 6685-01-421-4070
NSN 2925-01-505-1666
NSN 5990-01-378-1444
NSN 5985-01-487-4984
NSN 6220-01-313-9583
NSN 5930-00-263-0110
NSN 6620-00-186-8220
NSN 4140-00-210-0552
NSN 5930-01-592-9698