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 5999-01-646-0242
NSN 6610-00-161-0680
NSN 5998-00-341-6504
NSN 5855-00-688-9954
NSN 5998-01-115-0135
NSN 6220-01-034-1231
NSN 5895-00-763-3020
NSN 5965-00-558-3684
NSN 4140-00-732-9427
NSN 5960-01-374-0764
NSN 5950-00-707-3524
NSN 2925-01-087-1677