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 5910-01-323-2305
NSN 5925-01-104-4893
NSN 6220-01-050-8122
NSN 5910-01-074-3037
NSN 6110-01-107-5527
NSN 6645-01-170-5402
NSN 6645-00-004-8628
NSN 5935-01-303-6666
NSN 6685-01-423-6387
NSN 5935-01-304-2253
NSN 6320-01-610-4410
NSN 5999-00-853-3104