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 5999-01-160-1064
NSN 5915-01-518-1551
NSN 6685-00-759-4097
NSN 6645-00-226-2270
NSN 6320-01-512-2031
NSN 7035-00-731-8729
NSN 6320-00-186-6452
NSN 5990-01-443-2931
NSN 6110-01-528-7765
NSN 5925-00-186-8669
NSN 6320-01-039-5891
NSN 6130-01-263-5724