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 5855-01-120-7831
NSN 5930-01-066-3052
NSN 6620-01-386-5543
NSN 5950-01-361-9862
NSN 5965-01-531-3496
NSN 6145-01-462-4452
NSN 6685-00-421-2508
NSN 6610-00-468-1958
NSN 5920-01-078-7560
NSN 4140-01-027-7516
NSN 4140-01-336-7722
NSN 5975-01-381-3218