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 6620-01-143-2569
NSN 6645-00-922-0886
NSN 5985-00-644-5289
NSN 5935-00-555-2633
NSN 6685-00-982-2843
NSN 6685-01-658-2809
NSN 4140-01-632-4695
NSN 5895-01-561-1638
NSN 5915-00-753-7433
NSN 6645-00-551-8291
NSN 5835-00-958-6231
NSN 5925-01-647-5615