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 6135-01-556-7318
NSN 4140-01-253-3288
NSN 5975-00-818-9140
NSN 4140-00-541-9077
NSN 6650-00-680-9595
NSN 6135-01-518-9813
NSN 5999-01-421-3388
NSN 5855-00-401-3442
NSN 5925-00-425-6228
NSN 5920-01-009-7719
NSN 5998-00-410-1555
NSN 5855-01-594-0172