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 6135-00-078-9931
NSN 6135-01-167-7604
NSN 5999-01-004-7300
NSN 6320-01-414-9801
NSN 5965-01-399-8454
NSN 5950-00-544-1372
NSN 6240-00-275-1950
NSN 5935-00-203-5372
NSN 6685-01-204-0178
NSN 5965-01-146-1311
NSN 6240-01-504-8772
NSN 5950-00-666-1887