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 5905-00-473-7972
NSN 6645-00-443-8011
NSN 6320-00-857-4073
NSN 6130-01-422-0304
NSN 5998-01-519-8033
NSN 2925-00-167-6762
NSN 6130-01-410-7551
NSN 5996-01-512-6170
NSN 6145-01-603-1659
NSN 6110-00-756-3784
NSN 6240-01-014-7530
NSN 5996-01-522-2687