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 6105-01-300-5316
NSN 5960-01-503-8411
NSN 5945-01-590-0251
NSN 4140-00-886-1710
NSN 6110-01-601-6637
NSN 5915-01-252-8683
NSN 7035-01-474-9537
NSN 6145-01-062-6918
NSN 5960-01-595-6515
NSN 6145-01-571-3436
NSN 5905-01-168-7806
NSN 5945-01-430-2222