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 6620-01-315-1857
NSN 5999-00-664-1818
NSN 6320-01-607-1491
NSN 5925-01-548-1966
NSN 6220-00-001-2759
NSN 4140-01-301-4650
NSN 6610-00-526-5913
NSN 5930-01-103-8013
NSN 6685-01-074-4012
NSN 5945-01-463-1245
NSN 5920-00-601-2390
NSN 6110-00-099-7113