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 6135-01-190-2628
NSN 5965-00-546-4402
NSN 5950-01-384-3834
NSN 6145-01-129-7009
NSN 6150-00-666-3635
NSN 6130-00-900-4758
NSN 5998-01-583-4404
NSN 7035-00-300-3208
NSN 5990-00-975-1055
NSN 6145-00-567-7413
NSN 5996-00-111-7686
NSN 6685-01-409-2748