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 5895-01-394-7988
NSN 5960-01-038-5637
NSN 5925-00-597-1558
NSN 6240-01-103-3081
NSN 6130-00-846-4961
NSN 5930-00-503-9426
NSN 5915-00-208-4686
NSN 5999-01-459-7395
NSN 6135-00-134-6648
NSN 6135-01-476-4697
NSN 5855-00-560-0110
NSN 5960-01-657-5958