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 5920-00-504-8634
NSN 6685-01-509-1639
NSN 5920-01-646-6491
NSN 6220-01-438-4662
NSN 5990-01-050-7535
NSN 5910-00-079-0766
NSN 6220-00-079-4840
NSN 5990-01-507-7495
NSN 6150-01-107-5987
NSN 6645-01-200-5289
NSN 5855-00-013-1244
NSN 5950-01-325-1551