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 6685-01-416-9897
NSN 6320-01-021-6633
NSN 6240-01-476-7357
NSN 5945-01-608-3949
NSN 6320-00-831-2227
NSN 5925-01-305-4349
NSN 5996-01-570-4583
NSN 5990-01-577-2120
NSN 5935-00-368-4118
NSN 5835-01-136-3394
NSN 6240-01-431-0792
NSN 6145-01-634-0388