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 5990-00-167-2692
NSN 5895-01-157-8795
NSN 5895-01-462-2417
NSN 6620-00-940-9292
NSN 5990-01-568-5565
NSN 6130-00-222-6216
NSN 6240-01-423-9738
NSN 5985-01-062-2123
NSN 6220-01-229-5418
NSN 5945-01-648-4156
NSN 4140-00-975-2210
NSN 6240-01-507-3609