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 5920-01-190-5167
NSN 5945-01-634-0588
NSN 5945-01-066-5001
NSN 5998-01-411-6020
NSN 6620-01-545-7167
NSN 6105-01-562-7784
NSN 5835-01-276-4621
NSN 5960-01-037-7988
NSN 5965-00-422-5415
NSN 5935-01-553-6736
NSN 5999-00-595-5499
NSN 5950-01-056-5157