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 4140-01-234-6610
NSN 6135-00-683-0536
NSN 6620-01-478-7259
NSN 7035-01-495-7134
NSN 4140-01-133-9011
NSN 6105-01-492-5723
NSN 5935-01-383-3520
NSN 6105-00-194-6583
NSN 5930-01-368-5190
NSN 5915-01-494-3176
NSN 6620-01-473-5163
NSN 5895-00-900-8511