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 6135-01-204-3882
NSN 5945-01-141-7017
NSN 5999-01-090-0664
NSN 5998-01-129-0510
NSN 6105-01-460-8248
NSN 6145-00-212-0422
NSN 5945-01-156-6457
NSN 6685-01-467-3035
NSN 5998-00-088-5912
NSN 5935-01-361-1558
NSN 5920-01-616-7669
NSN 6135-00-422-3967