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 5996-01-215-2769
NSN 6645-00-941-9343
NSN 6145-00-239-2143
NSN 5920-01-331-1101
NSN 5935-01-236-0600
NSN 5905-01-569-1175
NSN 6240-00-855-4518
NSN 5915-00-290-1569
NSN 5895-01-569-0631
NSN 5915-01-095-4853
NSN 5855-01-451-2992
NSN 5835-00-289-9080