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 5835-00-583-1316
NSN 5999-01-207-0989
NSN 5835-01-519-2916
NSN 5905-01-443-5474
NSN 6610-01-400-3880
NSN 5945-00-309-4439
NSN 6220-01-577-0041
NSN 6220-01-113-2447
NSN 5910-01-506-5724
NSN 7035-00-941-4949
NSN 5895-01-131-5236
NSN 6145-00-295-2887