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 5925-01-378-9118
NSN 5998-01-321-6852
NSN 5855-01-645-8185
NSN 5965-00-242-9210
NSN 5930-01-413-2447
NSN 6620-00-456-0404
NSN 6135-00-377-9165
NSN 5920-00-930-4063
NSN 7035-00-131-8219
NSN 5999-01-060-1459
NSN 6130-01-414-6107
NSN 5855-00-051-2792