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 6645-01-190-0085
NSN 5999-00-264-5655
NSN 4140-00-443-6556
NSN 6650-01-225-4346
NSN 5925-01-141-7586
NSN 2925-00-085-7332
NSN 4140-01-234-8568
NSN 5990-00-940-8528
NSN 6320-00-116-3658
NSN 6650-01-024-9554
NSN 5945-01-271-4177
NSN 6645-01-317-1308