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 6220-00-866-9884
NSN 5945-01-365-6355
NSN 6145-00-202-8570
NSN 6320-01-438-6280
NSN 5895-01-444-3912
NSN 6240-00-964-8864
NSN 5996-01-305-4892
NSN 5930-01-573-7265
NSN 6620-01-139-6455
NSN 5920-00-087-4223
NSN 6135-01-625-0765
NSN 5950-01-313-8408