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 5915-01-139-5277
NSN 5990-01-161-4625
NSN 6620-01-492-9508
NSN 6610-00-371-5953
NSN 7035-01-413-6697
NSN 5905-01-483-7988
NSN 5945-01-295-8450
NSN 5855-01-380-9950
NSN 6135-01-096-1452
NSN 6240-00-287-1988
NSN 5950-01-142-8732
NSN 5950-01-538-2345