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 6685-01-442-1441
NSN 6320-01-006-6138
NSN 5930-01-474-7483
NSN 5855-01-098-5192
NSN 6105-00-932-5309
NSN 4140-00-875-9846
NSN 5920-01-535-8075
NSN 5915-01-586-7934
NSN 6130-01-423-3502
NSN 5920-01-422-4790
NSN 6650-01-101-9023
NSN 4140-01-047-4093