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 6150-01-029-5979
NSN 5950-00-534-6396
NSN 5905-01-535-0476
NSN 5935-00-111-8638
NSN 5855-01-178-6396
NSN 6240-00-159-0553
NSN 6130-01-318-0725
NSN 5965-01-546-7604
NSN 5910-01-485-8128
NSN 6240-00-612-0883
NSN 4140-00-930-4673
NSN 5905-01-026-8499