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 5960-01-552-8601
NSN 6620-01-213-8772
NSN 6135-00-321-6707
NSN 4140-00-612-9727
NSN 5930-01-465-6075
NSN 6320-01-493-4472
NSN 5998-01-169-4387
NSN 5930-00-249-2942
NSN 5915-00-500-7592
NSN 6645-01-375-9702
NSN 5855-01-138-4985
NSN 6110-00-877-9603