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 6105-01-531-7141
NSN 5950-01-383-8341
NSN 6220-01-085-4947
NSN 5960-00-372-4876
NSN 5996-01-338-2998
NSN 5835-01-097-5693
NSN 5915-00-659-2337
NSN 5998-01-640-7057
NSN 5855-00-138-2386
NSN 5950-01-169-4657
NSN 6610-00-731-9532
NSN 6135-01-457-7849