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 6240-00-493-3693
NSN 5915-01-439-8408
NSN 4140-01-482-2053
NSN 6150-01-195-2063
NSN 5990-00-678-6006
NSN 6220-01-574-8313
NSN 6620-00-186-3061
NSN 5855-00-256-5562
NSN 6620-00-951-0153
NSN 6220-00-559-3555
NSN 5975-00-146-1797
NSN 5960-01-495-0859