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 5835-00-083-6557
NSN 6610-01-560-6682
NSN 6685-01-373-5767
NSN 5935-01-532-4641
NSN 5855-01-062-5655
NSN 5990-01-200-7460
NSN 5920-00-105-5574
NSN 5835-01-264-8782
NSN 5985-01-126-2164
NSN 5996-01-230-8084
NSN 5998-00-526-8049
NSN 6650-01-229-7500