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 5910-00-106-7176
NSN 6620-00-912-9623
NSN 5925-00-992-4963
NSN 5999-01-521-8069
NSN 5965-01-367-2595
NSN 5855-01-381-6052
NSN 6135-00-451-0709
NSN 6110-01-185-5040
NSN 5950-01-554-6180
NSN 7035-01-023-1008
NSN 4140-01-185-1159
NSN 5855-00-631-4565