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 5910-01-104-5927
NSN 5925-01-447-9767
NSN 6130-01-560-0113
NSN 5935-01-559-8264
NSN 5990-01-217-1550
NSN 6220-00-319-2276
NSN 6240-00-559-3625
NSN 5985-01-392-2217
NSN 6135-01-151-2705
NSN 5990-00-901-2574
NSN 6650-00-434-0188
NSN 6150-01-487-4017