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 5930-00-737-2630
NSN 5935-00-908-7683
NSN 5920-01-534-1344
NSN 5945-01-536-0072
NSN 5920-01-173-8212
NSN 5835-00-013-9271
NSN 5925-01-578-6869
NSN 4140-01-530-5162
NSN 2925-00-969-4262
NSN 5950-01-120-0823
NSN 6240-00-114-5105
NSN 5945-00-057-6878