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 5905-01-221-5500
NSN 6645-00-420-5072
NSN 6135-01-022-5427
NSN 5998-00-582-1159
NSN 6620-01-367-2597
NSN 5975-01-102-4829
NSN 6150-01-469-5466
NSN 6145-01-160-4627
NSN 6150-01-083-2607
NSN 6110-01-348-2223
NSN 5835-01-534-3172
NSN 6220-00-541-8515