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 5915-01-200-8283
NSN 6645-00-488-4432
NSN 5990-01-243-4233
NSN 6110-01-449-0150
NSN 5950-00-262-0887
NSN 5998-01-581-0936
NSN 5835-01-203-8295
NSN 5925-00-080-2163
NSN 6320-01-600-5808
NSN 5950-01-571-6618
NSN 6645-01-150-2039
NSN 5965-01-350-1890