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 6620-01-212-8089
NSN 7035-00-009-8705
NSN 6220-01-078-7602
NSN 6135-01-445-5316
NSN 5835-01-360-2657
NSN 5905-01-421-2691
NSN 5985-01-539-6837
NSN 5960-00-106-1281
NSN 5960-00-068-4456
NSN 2925-00-005-1618
NSN 5985-01-367-2220
NSN 5965-01-603-9506