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 5895-01-616-1960
NSN 5925-00-169-3385
NSN 6110-01-422-1572
NSN 5998-01-545-3274
NSN 6135-01-469-7574
NSN 5999-00-413-7833
NSN 5915-01-556-4282
NSN 5855-00-631-4565
NSN 6145-01-423-9845
NSN 6685-01-540-5245
NSN 6135-01-400-2947
NSN 5960-01-172-2088