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 6240-00-233-3481
NSN 6220-00-186-8565
NSN 5930-01-482-2204
NSN 5905-01-130-9669
NSN 5990-01-199-2846
NSN 6320-01-504-3948
NSN 6650-01-290-8705
NSN 6145-01-289-5703
NSN 5935-00-090-3117
NSN 5895-01-388-2069
NSN 6645-00-527-6531
NSN 5998-01-401-5396