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 5855-01-175-2465
NSN 5965-01-253-5353
NSN 6645-00-449-4446
NSN 5930-00-954-8416
NSN 5930-00-101-9657
NSN 6650-00-851-7615
NSN 6685-00-690-1261
NSN 6110-00-986-8993
NSN 5920-01-010-2920
NSN 5985-01-235-7804
NSN 6110-01-568-0964
NSN 6130-00-846-3010