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 5915-01-226-7756
NSN 5999-00-546-6802
NSN 5925-01-280-8390
NSN 5895-01-534-3743
NSN 6620-01-207-0667
NSN 5855-00-912-3885
NSN 5998-00-150-7074
NSN 6320-01-140-7025
NSN 6130-00-067-4097
NSN 5945-00-397-2938
NSN 6150-00-190-5054
NSN 6685-01-633-7318