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 2925-01-551-5375
NSN 4140-01-648-2249
NSN 6130-01-319-8209
NSN 6650-01-512-9650
NSN 5920-01-503-2940
NSN 4140-01-444-1746
NSN 6240-00-602-8551
NSN 5930-01-187-8031
NSN 5915-01-397-8063
NSN 6320-01-495-6893
NSN 5950-01-401-5321
NSN 5950-01-154-9120