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 6620-00-783-9560
NSN 6130-00-135-0814
NSN 5935-01-256-5987
NSN 6685-01-020-2757
NSN 6320-00-400-8042
NSN 4140-01-546-8767
NSN 5998-00-580-4765
NSN 5960-00-990-6850
NSN 5910-01-165-7044
NSN 6130-01-535-3101
NSN 6320-00-931-4855
NSN 5945-01-011-3328