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 5925-01-056-5127
NSN 5910-01-035-5854
NSN 6645-00-030-8030
NSN 5910-00-162-0599
NSN 6650-00-804-2039
NSN 6220-00-213-5471
NSN 6150-01-432-4380
NSN 5910-01-555-7751
NSN 6110-01-515-1321
NSN 7035-01-557-2779
NSN 5920-01-348-4217
NSN 6220-01-416-0647