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 7035-00-076-4097
NSN 5910-00-156-7293
NSN 5920-00-601-2390
NSN 6645-01-200-5289
NSN 6645-01-338-1423
NSN 6240-00-886-3278
NSN 6220-01-528-4978
NSN 5960-01-535-1743
NSN 5910-01-191-4123
NSN 6145-00-210-6257
NSN 6220-00-136-7749
NSN 6135-01-573-7164