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 5950-01-301-1497
NSN 5915-01-309-1598
NSN 6650-00-220-2839
NSN 4140-00-816-8820
NSN 5985-01-588-0571
NSN 5965-01-091-1884
NSN 6105-01-384-3063
NSN 6145-01-329-1812
NSN 5960-01-162-5638
NSN 7035-01-384-4383
NSN 5925-01-500-9307
NSN 6220-01-462-3325