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 6645-01-622-1830
NSN 5985-00-558-0662
NSN 6240-00-519-3399
NSN 2925-01-013-0413
NSN 6320-00-164-4087
NSN 4140-01-058-1968
NSN 6145-01-340-8686
NSN 5998-01-561-1684
NSN 5975-01-518-8281
NSN 6135-01-435-6503
NSN 6645-01-633-1852
NSN 5999-00-969-5718