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 6620-01-372-4168
NSN 5835-01-213-0833
NSN 5960-01-340-4487
NSN 5920-01-130-5893
NSN 5925-01-016-4069
NSN 7035-01-144-3345
NSN 6110-00-221-8559
NSN 6220-00-486-4426
NSN 5930-01-390-5184
NSN 2925-01-231-6312
NSN 6220-01-373-4589
NSN 4140-01-251-4367