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 5965-01-153-1965
NSN 5960-00-989-8678
NSN 5950-00-970-9081
NSN 6240-01-381-4450
NSN 6240-00-086-6504
NSN 6320-01-094-2634
NSN 4140-01-423-1005
NSN 5990-01-612-5323
NSN 5920-01-297-5895
NSN 5915-00-945-9723
NSN 6685-01-468-5787
NSN 6650-01-475-3714