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 6610-01-116-2527
NSN 4140-01-211-6474
NSN 6240-01-391-7549
NSN 6110-01-229-7627
NSN 6110-01-101-3799
NSN 6240-01-226-4858
NSN 7035-00-631-3782
NSN 5990-01-473-4314
NSN 5965-01-487-4479
NSN 5925-01-111-8431
NSN 5855-01-258-6180
NSN 5960-01-004-5483