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 5925-00-554-4114
NSN 5985-00-881-9391
NSN 5996-00-909-4753
NSN 5935-00-525-6233
NSN 5990-01-254-3197
NSN 5930-01-579-3732
NSN 5855-00-320-4116
NSN 5935-01-068-3228
NSN 2925-01-618-5706
NSN 5975-01-131-6300
NSN 6685-01-478-4387
NSN 5999-00-408-8797