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 2925-01-248-2005
NSN 5998-01-478-6328
NSN 5915-01-254-3810
NSN 5985-00-494-7277
NSN 6645-01-045-4088
NSN 6320-00-557-3079
NSN 6240-01-628-2844
NSN 5925-00-175-5237
NSN 6105-01-308-0942
NSN 7035-01-216-4806
NSN 2925-01-544-4880
NSN 6135-00-660-8654