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 6145-00-146-9600
NSN 5925-00-944-3848
NSN 5990-01-022-6592
NSN 5930-01-562-6764
NSN 7035-01-515-7055
NSN 6685-00-909-6796
NSN 4140-01-007-6025
NSN 6620-01-557-6512
NSN 6130-01-529-7000
NSN 6320-01-054-3046
NSN 5965-01-399-8454
NSN 5895-01-054-3799