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 5985-00-876-1783
NSN 6130-01-441-9507
NSN 5998-00-254-1934
NSN 5935-01-289-6336
NSN 5910-00-977-2841
NSN 6320-00-456-0836
NSN 6135-00-932-3136
NSN 6105-01-100-5534
NSN 5855-01-317-5354
NSN 5905-00-099-9995
NSN 6240-01-318-9356
NSN 5910-01-394-9501