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 6240-01-506-2059
NSN 2925-01-591-4030
NSN 5835-01-528-1864
NSN 6240-00-868-2102
NSN 6320-00-681-1324
NSN 6620-00-910-8317
NSN 5999-01-592-5977
NSN 5930-01-634-0659
NSN 5925-01-131-7161
NSN 6650-00-569-1762
NSN 5960-01-595-6515
NSN 6110-00-690-8566