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 5945-01-190-5133
NSN 6240-00-008-1654
NSN 6220-01-512-0144
NSN 5975-01-208-0851
NSN 5996-00-586-5126
NSN 4140-01-411-5908
NSN 7035-01-216-4806
NSN 5855-01-242-6494
NSN 6110-00-056-8133
NSN 6220-01-447-2229
NSN 6650-00-456-5892
NSN 5965-01-453-3062