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 6685-01-306-2516
NSN 5915-01-208-7281
NSN 6240-01-611-5930
NSN 4140-01-238-1373
NSN 5960-00-224-5804
NSN 5915-01-013-8995
NSN 4140-01-362-8017
NSN 5999-01-157-9813
NSN 6105-00-472-3808
NSN 6135-00-299-6918
NSN 5920-01-391-6598
NSN 5925-01-602-5165