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 5998-01-412-0928
NSN 6135-01-440-9412
NSN 5905-01-414-9975
NSN 5990-01-076-8901
NSN 6685-00-843-5018
NSN 6610-00-697-0737
NSN 5960-01-019-4920
NSN 5998-01-652-7749
NSN 6145-01-613-1446
NSN 6110-00-015-7688
NSN 6110-01-550-8223
NSN 5935-01-399-3617