A nonmetallic unthreaded item generally round in cross-sectional shape which, when placed on/in a machined-out portion of the threads of a screw or bolt, or inserted into the machined-out portion of the threads of a nut, locks the item, to which it is fixed, to the attached mating member and prevents loosening during excessive vibration. Excludes bolt, self-locking; nut, self-locking (as modified); screw, self-locking; and insert, screw thread.
NSN 5925-01-630-5701
NSN 5999-01-414-8613
NSN 6145-00-310-7443
NSN 6620-01-550-6059
NSN 5935-00-916-5029
NSN 6135-00-789-2865
NSN 5960-01-092-1234
NSN 5855-00-327-2112
NSN 4140-01-235-5998
NSN 6135-00-078-9931
NSN 5915-01-514-8689
NSN 5996-01-140-4424