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 6105-01-587-3047
NSN 6240-01-160-8975
NSN 5930-00-244-9530
NSN 2925-01-304-2127
NSN 7035-00-834-2090
NSN 6135-01-539-5098
NSN 5835-00-827-1904
NSN 5935-01-415-4467
NSN 6130-01-307-0475
NSN 5935-01-447-5814
NSN 6145-01-517-3714
NSN 5920-01-352-0880