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 4140-01-067-8242
NSN 5915-01-438-0578
NSN 6610-00-904-4839
NSN 6650-01-261-3013
NSN 5998-01-440-1040
NSN 6105-01-508-5937
NSN 6220-01-334-8306
NSN 5835-01-487-3042
NSN 5855-01-551-7923
NSN 6110-01-400-4207
NSN 6620-01-266-5545
NSN 6620-01-085-8688