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 5915-01-618-1048
NSN 5965-01-463-2815
NSN 5975-00-725-1287
NSN 5975-01-141-1535
NSN 5960-01-051-9405
NSN 6685-01-270-4654
NSN 5965-01-239-4034
NSN 6105-01-145-5405
NSN 7035-01-528-7870
NSN 7035-01-021-1413
NSN 6135-01-426-8282
NSN 5950-00-445-6549