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 6320-00-593-0379
NSN 6105-00-189-0515
NSN 4140-01-072-4337
NSN 5915-01-153-7793
NSN 6145-00-000-0090
NSN 6130-01-599-5990
NSN 6220-00-937-5906
NSN 4140-01-538-5885
NSN 6135-00-505-0679
NSN 6220-01-550-9053
NSN 7035-00-275-5604
NSN 5895-01-040-0679