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 6685-01-634-0611
NSN 6240-01-144-1334
NSN 5998-00-801-6527
NSN 4140-00-024-5555
NSN 6110-00-983-5927
NSN 6650-01-273-3152
NSN 6320-01-397-0399
NSN 4140-01-252-4392
NSN 5915-01-443-3881
NSN 5945-01-552-4567
NSN 5895-01-539-6675
NSN 5999-01-131-4840