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 6135-01-578-7440
NSN 6130-00-019-3032
NSN 6240-01-003-8666
NSN 5895-01-367-2683
NSN 5945-01-254-3773
NSN 6105-01-282-4266
NSN 5990-00-236-8152
NSN 6130-01-245-7589
NSN 6240-00-617-9599
NSN 6685-01-045-9436
NSN 6645-00-239-5743
NSN 6650-01-148-5307