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 6685-00-724-2962
NSN 4140-01-256-4597
NSN 5996-01-618-8986
NSN 7035-01-129-4667
NSN 5915-01-469-3172
NSN 6145-00-296-0085
NSN 5925-01-354-1129
NSN 5950-01-267-8963
NSN 5950-01-032-4513
NSN 6150-01-283-3998
NSN 5996-00-435-0369
NSN 5999-00-644-9767