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 6645-01-495-5553
NSN 6620-00-041-3406
NSN 5998-00-079-8822
NSN 5895-00-234-3305
NSN 5945-01-051-0540
NSN 5910-01-216-8528
NSN 5945-00-908-2812
NSN 5915-00-056-1350
NSN 5985-00-779-5697
NSN 5999-00-452-2558
NSN 6620-00-140-8644
NSN 5999-01-617-0625