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 5935-01-599-2921
NSN 2925-01-037-5383
NSN 6650-01-112-8567
NSN 6610-01-624-5664
NSN 4140-01-212-1433
NSN 5975-01-299-6212
NSN 6650-00-776-5419
NSN 6645-01-434-8468
NSN 6610-01-178-0333
NSN 4140-00-876-0539
NSN 6145-00-150-1642
NSN 6105-01-194-1283