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 4140-01-633-2033
NSN 5930-00-249-8964
NSN 5905-01-471-6090
NSN 5935-00-116-1401
NSN 5965-00-617-5731
NSN 5915-01-415-6307
NSN 5930-01-398-9091
NSN 6685-00-551-0353
NSN 5905-00-884-4779
NSN 5920-01-323-6369
NSN 5950-00-198-4201
NSN 5945-01-158-1455