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 5905-01-223-7971
NSN 6650-00-372-6035
NSN 5996-00-794-1336
NSN 6220-01-285-5694
NSN 5999-01-192-5495
NSN 6130-01-532-0778
NSN 6620-00-678-8777
NSN 6645-00-935-7046
NSN 6645-00-300-6459
NSN 5996-01-516-6420
NSN 6610-00-450-4875
NSN 2925-01-487-0886