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 5915-01-168-5813
NSN 6220-00-594-4561
NSN 5996-01-339-7539
NSN 5905-00-536-7736
NSN 5950-00-771-5948
NSN 5915-01-460-2754
NSN 5945-01-327-5606
NSN 5895-01-602-9583
NSN 5960-00-539-6739
NSN 6135-01-419-2794
NSN 5960-01-325-2241
NSN 6240-01-513-9642