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 6135-01-434-6308
NSN 6685-01-516-8701
NSN 5975-01-147-9196
NSN 6620-01-227-8206
NSN 4140-00-328-1527
NSN 6150-00-508-5096
NSN 4140-01-287-5429
NSN 6685-00-155-9215
NSN 5855-01-549-9570
NSN 4140-01-211-8673
NSN 6645-00-330-2813
NSN 5950-00-659-9608