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 6620-01-100-0431
NSN 5895-01-414-9999
NSN 6110-01-145-8113
NSN 5945-00-625-9653
NSN 5945-00-729-2622
NSN 5999-01-089-3345
NSN 6150-01-200-2990
NSN 6320-00-405-2348
NSN 6685-01-084-0256
NSN 5855-01-122-9418
NSN 5998-01-612-0132
NSN 5925-00-499-9220