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 5975-00-301-1537
NSN 6135-01-052-9634
NSN 6130-01-120-5003
NSN 5999-01-519-2998
NSN 5835-01-133-6485
NSN 6220-00-844-9700
NSN 6650-00-276-9838
NSN 6240-01-546-8755
NSN 5930-00-977-9620
NSN 5945-01-076-3211
NSN 5999-01-023-3158
NSN 6320-01-021-6633