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 6105-01-578-6551
NSN 5950-01-479-6595
NSN 6610-01-572-1715
NSN 6150-01-519-3284
NSN 7035-00-887-4674
NSN 5855-00-869-3635
NSN 6610-01-299-7171
NSN 2925-01-157-9204
NSN 6135-01-231-4809
NSN 6685-01-651-7109
NSN 6620-00-984-7252
NSN 6685-01-516-4598