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 5910-01-333-9893
NSN 5990-01-208-4322
NSN 5960-01-435-1167
NSN 5920-00-184-2058
NSN 6645-00-149-1100
NSN 6130-01-123-9041
NSN 5975-00-897-6624
NSN 5905-01-550-0623
NSN 2925-00-167-6762
NSN 6620-01-441-0240
NSN 5855-01-291-6790
NSN 6150-00-830-0662