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 4140-00-133-4162
NSN 5835-00-490-0530
NSN 5910-01-527-5823
NSN 5935-00-087-3324
NSN 5996-00-057-0632
NSN 6645-00-006-6387
NSN 6650-01-258-5871
NSN 5990-00-104-4903
NSN 6320-00-468-8421
NSN 5950-01-099-1048
NSN 5975-01-117-9560
NSN 6145-00-269-4271