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 5990-01-104-0469
NSN 6110-00-982-9714
NSN 5920-01-129-1473
NSN 6620-00-172-9222
NSN 5985-00-317-8237
NSN 5945-01-119-4019
NSN 5945-01-398-4740
NSN 5910-01-310-8533
NSN 5999-01-106-7638
NSN 5999-01-121-7661
NSN 6145-00-104-6047
NSN 6320-01-054-3046