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 5910-01-254-2799
NSN 5996-01-569-6049
NSN 6150-00-058-8669
NSN 5930-00-188-8695
NSN 5990-00-978-4936
NSN 5990-01-463-2279
NSN 6620-01-436-3502
NSN 5998-01-175-6224
NSN 6110-00-827-0086
NSN 5998-01-544-3932
NSN 5975-00-432-7015
NSN 5925-00-246-4645