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 5945-00-268-3559
NSN 5996-01-498-1358
NSN 6320-00-343-1798
NSN 6610-01-350-5590
NSN 6645-01-195-6207
NSN 5999-01-323-5807
NSN 5975-01-087-7906
NSN 6105-00-650-7455
NSN 4140-01-029-4211
NSN 5915-00-370-4813
NSN 6320-01-512-2031
NSN 5990-01-328-2385