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 6220-01-348-8243
NSN 5998-00-411-8154
NSN 5905-00-079-5412
NSN 6135-01-516-4638
NSN 6620-01-149-9192
NSN 2925-01-446-6523
NSN 5960-01-395-9834
NSN 5895-00-267-7430
NSN 5905-01-498-0505
NSN 5975-00-346-3668
NSN 5990-01-346-8782
NSN 5855-01-180-2172