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 5930-01-231-8562
NSN 5990-01-411-5930
NSN 2925-00-797-1042
NSN 5835-00-419-0575
NSN 6150-01-444-9579
NSN 6145-01-359-2378
NSN 5950-01-634-0677
NSN 5990-01-645-2592
NSN 5950-01-512-0580
NSN 5999-01-575-4512
NSN 5855-01-110-9564
NSN 2925-01-456-6840