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 6145-01-462-2460
NSN 6650-01-170-4397
NSN 6240-00-242-0003
NSN 6105-00-008-4911
NSN 5990-01-595-9441
NSN 6105-01-327-4124
NSN 5965-01-437-8442
NSN 6685-00-952-5120
NSN 5965-00-594-3115
NSN 5960-01-304-3073
NSN 5835-00-130-6404
NSN 5990-01-434-7913