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 6685-01-159-0066
NSN 5920-00-216-8665
NSN 6650-00-375-6632
NSN 5895-01-161-1706
NSN 5960-01-528-1147
NSN 6685-00-891-3283
NSN 5915-00-816-9056
NSN 5895-01-180-1452
NSN 5960-01-151-4518
NSN 5915-01-608-9318
NSN 5985-01-388-7567
NSN 5925-01-472-1213