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 4140-01-431-6560
NSN 6620-00-257-2783
NSN 5935-01-378-5271
NSN 5835-01-447-2544
NSN 5998-01-209-2644
NSN 5960-01-066-2300
NSN 6220-01-128-5814
NSN 5910-01-608-3772
NSN 6105-01-143-5774
NSN 6685-00-900-8060
NSN 6145-00-487-7024
NSN 5895-01-525-7645