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 6135-01-136-7087
NSN 5945-00-182-7384
NSN 5895-00-313-9098
NSN 5996-01-099-1188
NSN 6610-01-312-6906
NSN 5935-01-320-6403
NSN 5895-00-263-3983
NSN 6220-01-491-9803
NSN 5910-00-008-9626
NSN 6620-01-197-5436
NSN 5999-00-705-3980
NSN 5895-01-612-7941