A replaceable cylindrical item designed to provide wear surface and maintain alignment of a reciprocating valve stem and the like, it may have a flange(s) and/or grooves.
NSN 5930-00-356-8753
NSN 5910-00-960-8659
NSN 6145-01-427-3520
NSN 5998-01-547-6698
NSN 5835-01-565-3411
NSN 2925-01-288-2091
NSN 5999-01-088-4347
NSN 5945-00-931-3714
NSN 5999-01-055-3341
NSN 5930-01-487-4842
NSN 5935-00-816-9923
NSN 6685-01-500-4808