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 6220-01-217-1517
NSN 5920-01-010-2920
NSN 5965-01-165-7496
NSN 5910-00-728-3541
NSN 5905-00-104-5869
NSN 6220-01-480-9140
NSN 5975-01-561-3710
NSN 6135-01-463-3898
NSN 6135-00-209-6918
NSN 2925-01-161-7440
NSN 6145-00-161-4629
NSN 6240-00-260-0399