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 5998-00-056-0892
NSN 5910-01-615-3280
NSN 5910-01-112-1250
NSN 5960-01-539-1956
NSN 5910-00-489-7780
NSN 5920-01-496-4617
NSN 5835-01-422-2399
NSN 5905-01-236-1012
NSN 5985-01-478-8672
NSN 5960-01-444-2205
NSN 6320-01-321-7658
NSN 5930-01-004-9916