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 6110-00-900-3970
NSN 2925-00-416-2894
NSN 6110-01-534-4933
NSN 5915-01-014-6309
NSN 4140-00-246-4969
NSN 6620-01-171-2505
NSN 6620-01-514-2949
NSN 4140-00-580-8508
NSN 6150-01-027-1693
NSN 6240-01-113-6412
NSN 5895-01-251-0591
NSN 6620-01-231-9731