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 6145-01-500-4002
NSN 5935-00-147-5406
NSN 6110-00-592-4040
NSN 5990-01-211-6136
NSN 5950-01-354-5246
NSN 5930-01-041-6281
NSN 5895-01-437-8871
NSN 5960-01-265-0354
NSN 5975-01-302-4892
NSN 5925-01-650-2652
NSN 5855-00-436-3852
NSN 6320-01-519-8767