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 5835-00-074-3700
NSN 5985-00-863-0450
NSN 7035-00-064-7008
NSN 5855-01-469-8099
NSN 5965-00-735-9315
NSN 6650-00-499-7446
NSN 5965-00-469-5009
NSN 4140-00-926-9648
NSN 5999-01-525-7937
NSN 6145-01-631-4598
NSN 6110-01-602-2815
NSN 6110-00-091-9436