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 6645-01-252-8870
NSN 4140-00-484-1137
NSN 5930-01-268-2275
NSN 6145-01-576-9609
NSN 5915-00-481-3088
NSN 6105-01-502-5913
NSN 5930-00-199-9466
NSN 6620-01-416-9882
NSN 6220-01-539-5242
NSN 6110-01-228-4618
NSN 5855-01-599-3055
NSN 4140-01-121-3980