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 5920-01-063-8123
NSN 6105-01-060-1593
NSN 5910-00-881-5499
NSN 6320-00-994-0179
NSN 5960-01-570-8605
NSN 5835-01-090-0784
NSN 6685-01-461-2869
NSN 5855-01-634-0259
NSN 5999-01-547-2643
NSN 5975-00-932-5591
NSN 5975-01-196-0485
NSN 5965-01-583-1507