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 6220-01-156-4564
NSN 2925-00-555-4578
NSN 5990-01-501-5409
NSN 5996-01-570-4583
NSN 6130-00-879-6532
NSN 5998-01-595-7445
NSN 5905-01-123-9715
NSN 6135-01-400-2947
NSN 6240-00-244-0483
NSN 5910-01-436-5950
NSN 5855-01-351-6875
NSN 6110-01-371-6862