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 5985-01-433-2242
NSN 5905-01-265-1088
NSN 5835-01-330-8597
NSN 5915-00-785-5931
NSN 6110-01-360-8911
NSN 2925-00-355-5130
NSN 6650-01-576-8520
NSN 5925-00-629-1974
NSN 6240-00-898-6601
NSN 5935-01-608-4700
NSN 5990-00-004-4158
NSN 5965-01-532-5020