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 5996-01-050-0900
NSN 5999-00-177-3383
NSN 6320-00-908-6841
NSN 5999-00-765-0866
NSN 5895-01-033-8292
NSN 5950-01-647-0517
NSN 5910-01-542-4476
NSN 6150-01-600-7680
NSN 6110-01-460-8843
NSN 2925-01-327-3069
NSN 5960-01-632-6576
NSN 5925-01-579-6730