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 6240-00-299-6468
NSN 5950-01-318-4148
NSN 5855-00-763-2155
NSN 5965-01-378-1393
NSN 5905-00-629-8188
NSN 5960-00-884-2535
NSN 5920-01-579-7485
NSN 5935-01-514-0433
NSN 6320-01-029-4220
NSN 5950-01-386-7182
NSN 6645-01-283-5387
NSN 6610-01-513-0303