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 5930-01-325-7606
NSN 5960-01-142-1995
NSN 5895-01-159-9903
NSN 5915-01-475-2332
NSN 5975-00-186-3968
NSN 5930-01-039-4728
NSN 7035-01-232-7263
NSN 6135-01-086-0809
NSN 6220-01-145-0198
NSN 5996-01-646-5174
NSN 5996-01-248-0947
NSN 5999-01-393-2699