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 6240-01-507-9304
NSN 4140-00-269-8545
NSN 6685-01-149-9196
NSN 5990-01-608-9271
NSN 5990-01-395-4194
NSN 5998-01-520-7568
NSN 6105-01-519-5222
NSN 6130-01-128-9358
NSN 5990-01-013-8464
NSN 5855-00-631-4565
NSN 6320-01-165-8932
NSN 5905-01-237-0060