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 5960-01-599-9821
NSN 5835-00-816-0394
NSN 5935-01-458-5305
NSN 5975-01-263-7342
NSN 5895-01-309-2404
NSN 6650-00-469-6682
NSN 5895-00-637-2658
NSN 2925-01-348-3206
NSN 5835-00-529-6307
NSN 6685-00-663-9000
NSN 6145-01-309-4914
NSN 5990-00-022-8146