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 6240-01-556-2924
NSN 4140-00-116-1022
NSN
NSN 6145-01-215-0178
NSN 5925-01-198-9910
NSN 5950-01-360-1489
NSN 5895-01-276-0576
NSN 5855-00-149-0766
NSN 5945-01-364-7904
NSN 5895-01-152-7887
NSN 4140-01-056-4453
NSN 6135-01-252-0315