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 6685-01-123-5608
NSN 7035-01-506-8898
NSN 5935-00-885-5520
NSN 6130-00-941-9780
NSN 6220-01-456-7083
NSN 6650-01-085-2388
NSN 7035-00-541-8516
NSN 2925-00-928-5931
NSN 6610-00-078-9620
NSN 6220-00-554-5937
NSN 5985-01-270-4685
NSN 7035-01-654-2543