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 6650-00-451-8174
NSN 6650-00-855-9135
NSN 6105-01-495-1492
NSN 6220-01-264-3485
NSN 5930-01-476-7248
NSN 5905-00-175-7434
NSN 6145-01-364-6011
NSN 5935-01-501-1378
NSN 6610-01-522-3345
NSN 6150-01-206-1074
NSN 5950-00-479-9707
NSN 5935-01-206-4432