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 6110-01-062-4291
NSN 6130-01-473-0349
NSN 5935-00-850-2929
NSN 6645-01-021-5727
NSN 5998-01-158-6952
NSN 2925-00-497-7808
NSN 6610-01-089-2487
NSN 6240-01-031-3164
NSN 5945-01-323-2339
NSN 7035-01-539-3781
NSN 5965-01-100-1195
NSN 5945-01-420-8927