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 5960-01-521-5827
NSN 5965-00-246-5612
NSN 6645-00-849-4429
NSN 4140-01-507-4469
NSN 5965-01-474-5654
NSN 5835-00-804-0569
NSN 5935-00-809-9129
NSN 6645-01-267-5505
NSN 5905-01-587-9085
NSN 5925-00-843-0315
NSN 4140-00-137-2493
NSN 5996-01-189-9480