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 6105-00-084-1580
NSN 6645-01-280-5395
NSN 2925-01-224-1885
NSN 5930-01-145-4520
NSN 5999-01-441-5586
NSN 5915-01-596-0593
NSN 6220-01-020-7873
NSN 6130-00-365-4572
NSN 5905-01-441-2213
NSN 5998-01-383-8330
NSN 6240-00-306-9214
NSN 5999-00-119-8992