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 5990-00-099-0822
NSN 5855-01-027-1571
NSN 5945-01-018-8535
NSN 5910-01-462-0127
NSN 5920-01-023-0040
NSN 6610-00-760-9916
NSN 6650-01-537-0443
NSN 5835-01-485-0210
NSN 6320-00-450-7014
NSN 2925-00-566-4522
NSN 5960-01-251-9659
NSN 5915-01-609-8557