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 5999-01-255-3270
NSN 6145-01-248-1466
NSN 5990-01-116-2181
NSN 5920-00-996-5232
NSN 5999-01-514-2224
NSN 5985-01-325-1948
NSN 5895-01-427-9856
NSN 5925-01-264-8107
NSN 5835-01-412-6901
NSN 5915-01-354-9625
NSN 2925-01-446-6523
NSN 5996-00-892-6108