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 5950-01-133-3811
NSN 6110-01-207-9784
NSN 6105-00-218-4705
NSN 4140-00-062-1335
NSN 5960-01-530-0581
NSN 5996-00-836-5681
NSN 5998-01-519-7848
NSN 5945-01-550-0875
NSN 6110-01-296-0742
NSN 5985-01-175-4365
NSN 5950-01-383-1538
NSN 6135-01-458-3851