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 5965-01-026-8624
NSN 5999-01-283-1289
NSN 5999-01-367-0496
NSN 5990-01-055-4012
NSN 5999-01-659-3961
NSN 5945-01-555-8373
NSN 6105-00-688-5679
NSN 6135-00-284-1406
NSN 4140-00-373-4833
NSN 5935-01-043-6952
NSN 5925-00-946-9423
NSN 6220-01-224-0224