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 4140-00-552-7370
NSN 5990-01-065-0492
NSN 6105-00-620-4521
NSN 6610-01-657-1773
NSN 5905-00-558-4771
NSN 6685-00-170-9237
NSN 5905-01-563-2247
NSN 5935-01-256-5887
NSN 5998-00-815-1896
NSN 5985-01-359-9182
NSN 5930-00-465-7263
NSN 6240-01-189-6955