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 5975-01-285-1154
NSN 5930-01-398-9576
NSN 6610-01-278-9387
NSN 6650-00-338-7350
NSN 5945-01-524-3305
NSN 2925-00-465-6354
NSN 5930-01-493-5143
NSN 5945-01-602-9948
NSN 5965-01-339-3087
NSN 6620-00-050-1086
NSN 5985-01-147-3900
NSN 5975-00-012-4376