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: Other parts of airplanes or helicopters for use in military aircraft (excludes propellers, rotors, undercarriages, and parts thereof)
NSN 5945-01-164-6119
NSN 6650-00-170-5095
NSN 6650-01-464-3545
NSN 5910-01-024-1021
NSN 2925-01-463-3899
NSN 6145-00-961-0775
NSN 6135-01-316-9794
NSN 7035-01-004-8819
NSN 5985-00-937-4687
NSN 5996-00-336-3046
NSN 6105-01-542-1174
NSN 5895-00-733-9278