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 6110-01-455-6598
NSN 5855-01-468-4996
NSN 5930-01-061-8093
NSN 6150-01-613-8455
NSN 5855-01-020-7982
NSN 5985-01-517-6238
NSN 5985-00-234-7624
NSN 6240-01-022-3917
NSN 5915-01-086-9675
NSN 5905-01-512-9136
NSN 6110-00-614-4763
NSN 7035-01-169-6551