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 4140-01-250-2600
NSN 5930-00-554-1064
NSN 5990-01-229-3003
NSN 5915-00-589-2977
NSN 5999-01-351-6979
NSN 4140-01-176-2818
NSN 6105-01-219-2471
NSN 6135-00-073-8939
NSN 6130-01-555-9205
NSN 5975-01-360-2527
NSN 5925-01-476-9974
NSN 5975-01-419-6733