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 6240-00-045-3203
NSN 5915-01-221-2695
NSN 5855-00-912-3885
NSN 5998-00-065-5718
NSN 7035-00-803-3056
NSN 6650-00-569-1762
NSN 5998-00-615-1086
NSN 6685-01-182-5130
NSN 5990-01-362-5373
NSN 2925-01-339-6972
NSN 5960-00-158-4841
NSN 6110-01-413-1514