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 4140-01-621-9723
NSN 5985-00-084-0213
NSN 6685-01-091-6254
NSN 5910-01-610-0601
NSN 6110-01-557-9732
NSN 5915-01-057-0623
NSN 6105-01-325-1786
NSN 5895-01-482-3608
NSN 5915-01-550-4536
NSN 4140-01-412-1566
NSN 5945-00-816-9717
NSN 7035-01-340-3272