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 6135-01-469-7574
NSN 6150-01-050-4606
NSN 6135-00-405-1989
NSN 5915-01-494-0651
NSN 5999-00-248-7240
NSN 5950-00-278-1201
NSN 6240-00-472-4635
NSN 5855-01-079-8716
NSN 5990-01-023-3307
NSN 5925-01-319-6738
NSN 5915-01-539-7634
NSN 5999-01-014-5337