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 5950-01-116-2142
NSN 4140-01-079-6886
NSN 6110-01-453-8245
NSN 6240-00-436-5389
NSN 5950-01-097-1850
NSN 5895-01-370-3351
NSN 6620-01-236-4656
NSN 6110-01-450-9654
NSN 5975-00-335-2586
NSN 5975-00-098-5464
NSN 6135-01-612-6991
NSN 6220-01-597-2599