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: Parts for spark-ignition or compression-ignition internal combustion piston engines for use in aircraft except civil
NSN 6685-01-594-0453
NSN 6320-01-481-7322
NSN 5930-00-232-4777
NSN 6150-01-135-4482
NSN 5835-01-589-4735
NSN 5915-01-366-9850
NSN 5920-01-413-1608
NSN 6610-01-028-7651
NSN 5950-01-071-3335
NSN 5905-00-116-8560
NSN 4140-01-369-8641
NSN 4140-01-608-1836