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 5990-01-037-0274
NSN 5965-00-878-9614
NSN 5915-01-069-2775
NSN 5895-00-244-0943
NSN 5855-01-569-4057
NSN 5915-00-170-4209
NSN 5910-01-378-7026
NSN 6240-01-616-3334
NSN 6150-01-042-4942
NSN 6645-01-083-4759
NSN 6150-01-181-2723
NSN 4140-01-445-5945