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 5855-01-422-8782
NSN 6135-01-463-7077
NSN 6620-01-156-4641
NSN 7035-00-312-3055
NSN 5935-01-008-9462
NSN 6220-00-769-4050
NSN 5925-00-792-9073
NSN 6135-01-277-0599
NSN 5985-01-012-0948
NSN 6130-01-243-2760
NSN 5915-00-007-1297
NSN 7035-01-363-2748