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 2925-01-492-5342
NSN 5930-00-938-9427
NSN 5905-01-553-9473
NSN 5930-01-593-7709
NSN 5975-01-398-2898
NSN 7035-01-561-3556
NSN 6610-01-519-3080
NSN 5965-00-289-6280
NSN 5950-01-651-9898
NSN 6130-01-154-9825
NSN 5945-00-758-4610
NSN 4140-01-631-4747