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 5915-00-126-6627
NSN 6645-01-222-3458
NSN 5950-00-625-7815
NSN 6145-01-428-4071
NSN 6130-01-284-3978
NSN 6110-01-499-8581
NSN 6110-01-029-2011
NSN 5925-01-072-3167
NSN 5950-00-401-6695
NSN 6685-01-419-0909
NSN 7035-01-484-2709
NSN 5835-01-277-7167