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 5985-01-103-0248
NSN 6135-01-190-2628
NSN 5950-00-228-9881
NSN 6135-00-209-6918
NSN 6645-00-399-1862
NSN 6685-01-205-0467
NSN 6145-01-469-6276
NSN 6145-01-617-1118
NSN 6650-00-084-4258
NSN 4140-01-099-6657
NSN 4140-00-684-4073
NSN 5975-01-463-3430