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 5935-01-108-9707
NSN 5999-00-493-9471
NSN 6150-01-513-6985
NSN 5920-01-578-6279
NSN 5985-01-595-9942
NSN 6130-01-069-3290
NSN 7035-00-417-2967
NSN 5999-00-189-8191
NSN 6685-01-423-7526
NSN 5999-01-009-5459
NSN 5975-01-599-1674
NSN 5985-01-122-9476