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 5920-01-139-4384
NSN 5985-00-922-1272
NSN 5945-00-013-2041
NSN 5950-00-508-0951
NSN 5998-01-406-5427
NSN 2925-01-527-8745
NSN 5895-01-568-8724
NSN 6685-01-573-7031
NSN 5925-01-042-2812
NSN 6145-00-234-0251
NSN 6320-01-144-3810
NSN 5998-00-189-1570