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 5915-01-557-7909
NSN 6645-00-451-6462
NSN 5925-01-371-1360
NSN 5855-01-179-8887
NSN 6220-01-175-1246
NSN 6135-01-428-8821
NSN 5895-01-211-6807
NSN 7035-00-679-9027
NSN 6130-00-787-9976
NSN 6105-01-338-5945
NSN 5960-00-109-2806
NSN 6620-01-287-1443