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 6220-01-178-6275
NSN 5985-01-346-2979
NSN 5855-01-264-8599
NSN 6645-01-168-8465
NSN 5910-01-340-2409
NSN 5895-01-052-4877
NSN 6645-00-155-2398
NSN 5996-00-763-6245
NSN 5999-00-070-5884
NSN 7035-01-131-1168
NSN 7035-01-627-9427
NSN 5965-01-173-9106