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 spark-ignition or compression-ignition internal combustion piston engines for use in aircraft except civil
NSN 5905-01-329-9313
NSN 5920-01-450-3523
NSN 4140-01-373-7044
NSN 6650-01-090-0719
NSN 6620-00-375-0393
NSN 6135-01-550-6279
NSN 5990-00-753-8870
NSN 5910-01-328-8539
NSN 6135-00-826-4798
NSN 6620-00-963-1319
NSN 5905-01-573-5211
NSN 5975-01-068-3549