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 5915-01-234-5797
NSN 5998-01-423-5707
NSN 2925-01-495-1178
NSN 6150-01-316-4881
NSN 5975-01-443-6701
NSN 5905-01-376-0985
NSN
NSN 5930-00-826-0782
NSN 5975-00-872-0765
NSN 6110-01-371-7845
NSN 4140-00-256-1471
NSN 2925-01-545-2717