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 5920-01-049-0022
NSN 5990-00-631-1617
NSN 6105-00-011-8083
NSN 5996-01-147-6054
NSN 5855-00-100-9003
NSN 6220-01-634-0660
NSN 5905-01-358-1897
NSN 5925-00-130-2586
NSN 5905-01-275-1014
NSN 5945-01-132-4877
NSN 5905-01-238-2151
NSN 5915-00-568-2815