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 5945-01-534-9923
NSN 5915-01-570-7410
NSN 5910-01-050-7462
NSN 5935-01-322-4930
NSN 2925-00-004-1278
NSN 5996-01-027-5054
NSN 5996-01-430-7180
NSN 6645-00-454-0930
NSN 5960-01-246-4643
NSN 6620-01-530-1201
NSN 5895-00-981-8642
NSN 6145-01-320-5956