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 5998-01-175-0309
NSN 6220-00-963-9359
NSN 5975-00-673-9869
NSN 7035-00-500-7839
NSN 5920-00-652-1576
NSN 6105-01-322-1985
NSN 5996-00-187-8072
NSN 5835-01-532-9373
NSN 5998-01-073-9608
NSN 5920-01-461-5226
NSN 5930-00-579-6327
NSN 5985-00-006-9006