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 6220-01-027-1294
NSN 6620-01-168-8450
NSN 4140-01-273-0196
NSN 5996-01-462-0112
NSN 6110-01-102-1425
NSN 6105-01-020-9013
NSN 7035-01-242-6496
NSN 2925-01-182-9924
NSN 5996-01-566-8996
NSN 5835-01-100-7405
NSN 5930-01-482-7779
NSN 6620-00-707-4195