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 6650-01-305-0027
NSN 5998-01-426-8989
NSN 4140-01-318-2432
NSN 2925-00-149-0760
NSN 5965-01-202-1007
NSN 6150-00-925-4542
NSN 5945-01-571-6997
NSN 6220-00-793-3167
NSN 6105-00-003-6141
NSN 4140-00-884-9859
NSN 5998-01-074-9661
NSN 5965-00-518-0958