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 5965-01-374-2376
NSN 5999-00-125-9448
NSN 6105-01-210-5148
NSN 6650-00-476-9450
NSN 5855-01-187-2293
NSN 6685-01-535-6466
NSN 5925-00-777-4083
NSN 5965-00-185-9687
NSN 6610-01-400-3880
NSN 6105-01-170-4751
NSN 5915-01-029-4128
NSN 6110-00-448-9489