A circular, single or multipiece item, metallic or nonmetallic in composition, designed to be fitted in a circumferential groove in a piston and to spring outward against the cylinder wall to function as a seal or wiper. It is supplied in various cross-sectional shapes and is cut through at one point to allow for installation in the piston ring groove. It may include an expander. Excludes packing, preformed; retainer, oil seal; retainer, packing; ring, retaining; ring wiper; and seal ring, metal.
Classification: Parts for steam turbines
NSN 5975-01-290-3717
NSN 5985-00-678-3648
NSN 6240-00-290-4185
NSN 5998-01-146-4752
NSN 5960-00-306-4177
NSN 5950-01-381-2994
NSN 5835-00-453-9752
NSN 6620-00-225-4870
NSN 5930-01-634-0659
NSN 5998-01-162-6274
NSN 2925-00-982-0409
NSN 5990-00-870-0656