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 5990-01-204-7576
NSN 5835-01-581-9433
NSN 6105-01-110-7703
NSN 6130-01-480-8108
NSN 6685-00-586-2269
NSN 5835-01-462-5983
NSN 6645-00-824-6407
NSN 5920-01-086-7219
NSN 5925-00-190-0095
NSN 5965-00-772-0545
NSN 2925-01-327-3069
NSN 5835-00-770-2843