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 6240-00-878-1965
NSN 6110-00-816-1823
NSN 5996-01-193-5180
NSN 5910-01-222-8155
NSN 5835-01-495-0595
NSN 5965-01-379-7706
NSN 5835-01-641-0073
NSN 6135-01-633-8502
NSN 5985-01-393-1098
NSN 5855-01-167-2162
NSN 5935-01-385-3578
NSN 5985-01-490-4285