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 5925-01-274-9349
NSN 5895-01-379-4797
NSN 5990-01-149-0691
NSN 5965-00-961-1627
NSN 5925-00-865-7869
NSN 7035-01-177-2807
NSN 5965-01-074-7306
NSN 5965-01-262-3513
NSN 5999-01-138-3968
NSN 6240-01-304-2798
NSN 5985-01-168-0246
NSN 5950-01-324-6563