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 5925-01-434-3988
NSN 5990-01-316-0989
NSN 6150-01-487-3026
NSN 5910-01-017-9853
NSN 6610-00-803-4374
NSN 5930-00-884-0762
NSN 6130-01-422-7323
NSN 5965-00-913-9545
NSN 7035-01-338-8464
NSN 4140-01-592-3151
NSN 5855-01-630-4299
NSN 5950-01-023-2587