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 5975-01-519-0795
NSN 5999-01-551-1371
NSN 5960-01-142-1995
NSN 6130-01-196-0607
NSN 6150-01-356-4546
NSN 5996-01-265-3657
NSN 2925-00-017-0526
NSN 6145-01-188-1530
NSN 5965-01-350-1890
NSN 5990-00-170-4239
NSN 5950-01-416-9848
NSN 5935-01-417-0148