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 5895-00-361-2609
NSN 2925-00-623-3103
NSN 6220-01-449-4202
NSN 6135-01-399-8230
NSN 6145-00-231-7719
NSN 5998-01-401-5396
NSN 5960-01-612-5408
NSN 5925-00-118-8059
NSN 5998-01-065-3351
NSN 5925-00-957-8286
NSN 5990-01-408-6554
NSN 6685-01-032-5591