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 2925-01-280-1911
NSN 6685-00-044-3078
NSN 5930-01-322-0920
NSN 5895-01-467-0647
NSN 7035-01-481-1552
NSN 6650-01-095-4987
NSN 7035-01-444-4240
NSN 5895-00-421-9850
NSN 5920-00-490-1226
NSN 5925-01-132-8569
NSN 6110-01-260-7541
NSN 7035-00-870-0290