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 6240-01-370-5818
NSN 5999-01-505-6826
NSN 6135-01-584-0941
NSN 6320-01-497-3116
NSN 5925-00-480-6710
NSN 6685-01-612-3748
NSN 6240-01-068-8828
NSN 6105-01-221-6074
NSN 6650-00-842-5463
NSN 5990-01-443-2931
NSN 5960-01-593-4760
NSN 6620-00-171-4035