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 5925-00-219-2908
NSN 6240-01-383-7448
NSN 5915-01-630-5696
NSN 5915-01-117-6389
NSN 5855-01-020-7982
NSN 5855-01-613-9984
NSN 5975-01-227-6858
NSN 6110-00-418-9363
NSN 5975-00-134-2674
NSN 5910-01-534-7699
NSN 6220-01-020-8703
NSN 6110-01-452-1719