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 5920-01-392-4094
NSN 2925-01-535-7235
NSN 5996-01-391-7648
NSN 5895-01-575-6048
NSN 6320-01-115-4404
NSN 2925-01-522-5631
NSN 5950-01-063-8558
NSN 6150-01-454-3403
NSN 5998-00-545-5901
NSN 6150-00-596-9253
NSN 6150-01-008-7001
NSN 5855-01-465-6872