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 6135-01-190-2628
NSN 5996-01-027-1342
NSN 6240-01-401-5340
NSN 6240-00-166-2271
NSN 5965-01-239-4034
NSN 5935-00-681-1120
NSN 5975-01-454-9228
NSN 2925-01-381-5307
NSN 5855-01-631-4331
NSN 5960-00-721-1744
NSN 6105-00-388-6572
NSN 6320-00-456-0836