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 5920-01-371-2869
NSN 5920-01-056-5284
NSN 6240-01-184-6831
NSN 6240-01-319-7632
NSN 5910-01-104-3917
NSN 6610-00-901-4521
NSN 5990-00-819-6777
NSN 5996-01-172-0297
NSN 5975-01-107-4198
NSN 6685-01-422-3514
NSN 6145-01-432-2440
NSN 6150-01-625-7816