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 6145-01-152-2417
NSN 5998-00-620-9943
NSN 6105-01-314-4846
NSN 7035-00-167-7411
NSN 5915-01-509-7206
NSN 5999-00-915-7562
NSN 5930-01-046-9771
NSN 6650-01-422-1037
NSN 5998-00-689-6768
NSN 7035-01-337-8128
NSN 5835-00-286-5432
NSN 5998-01-569-3599