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 6145-00-263-6989
NSN 7035-01-466-1577
NSN 5965-01-660-5281
NSN 6320-00-089-9426
NSN 6650-00-406-2645
NSN 5855-01-415-3987
NSN 5960-01-454-7064
NSN 7035-01-132-7209
NSN 6135-00-152-8729
NSN 6145-00-213-9181
NSN 5999-00-646-8103
NSN 5950-01-027-0035