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 5915-01-410-7822
NSN 6645-01-500-0827
NSN 6135-01-168-2944
NSN 5985-01-337-9198
NSN 6135-01-246-0308
NSN 5855-01-601-8145
NSN 6220-01-075-2438
NSN 5996-01-274-9453
NSN 6150-01-201-1144
NSN 6135-01-562-6582
NSN 6610-01-014-2079
NSN 6650-01-122-0169