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 6685-01-180-3807
NSN 5895-00-737-4831
NSN 6220-01-550-7173
NSN 5925-01-633-7068
NSN 6685-01-231-7794
NSN 5990-01-365-3453
NSN 5920-01-207-3598
NSN 5905-01-333-9680
NSN 6650-01-107-7553
NSN 6135-00-833-9909
NSN 6130-00-411-7124
NSN 6650-01-633-9147