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 5925-00-104-5761
NSN 5835-01-479-7908
NSN 6240-01-425-1545
NSN 5905-01-350-4174
NSN 4140-01-314-4013
NSN 5945-01-630-2480
NSN 5925-01-008-0225
NSN 6220-01-427-2333
NSN 5935-00-517-0849
NSN 5915-00-005-4263
NSN 5975-01-250-2940
NSN 6150-01-166-2378