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 5920-01-315-1974
NSN 5990-01-315-3754
NSN 5910-00-199-6100
NSN 6610-01-580-6045
NSN 5920-01-299-8404
NSN 5905-01-098-7186
NSN 6220-00-964-1042
NSN 6240-01-111-3394
NSN 6650-00-035-9297
NSN 5915-01-503-0155
NSN 6220-01-301-8637
NSN 6150-01-094-7298