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 5975-01-559-0731
NSN 6110-01-385-4820
NSN 6320-01-592-6248
NSN 6240-00-057-2417
NSN 6105-00-161-1834
NSN 7035-00-009-8705
NSN 5965-01-392-6511
NSN 5935-00-632-7783
NSN 5985-00-056-9625
NSN 5895-00-608-5815
NSN 6320-01-652-3806
NSN 6220-00-436-7570