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 5935-01-593-2331
NSN 5930-00-907-2424
NSN 5910-00-383-1993
NSN 5915-00-862-5347
NSN 5920-01-515-5712
NSN 5990-00-081-5370
NSN 6685-00-116-2839
NSN 5999-00-307-3125
NSN 2925-01-193-6689
NSN 6220-01-152-2637
NSN 5905-00-280-2747
NSN 6105-01-416-7769