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 steam turbines
NSN 5925-00-872-6522
NSN 5855-01-497-0467
NSN 5925-01-398-3244
NSN 6650-01-462-5879
NSN 6135-00-078-9931
NSN 5855-00-149-0766
NSN 5925-00-954-3212
NSN 6240-01-044-7384
NSN 5998-00-673-8570
NSN 5855-01-364-1005
NSN 5998-01-183-6670
NSN 6685-00-923-6383