A circular shaped item with an aperture manufactured to predetermined dimensions and designed for use as a seal in stuffing boxes, packing nuts, and the like. It may be (1) any nonmetallic molded or formed ring (except solid (without joint) rings having a square or rectangular cross section); or (2) any shredded metal or metal foil type metallic or semimetallic rings. Excludes felt items but includes multimaterial items in which one of the materials is felt. For solid (without joints) nonmetallic items with a square or rectangular cross section, see washer (as modified) and gasket. For rubber items specifically designed for weather-proofing doors, windows, chests, and the like see seal, nonmetallic angle; seal, nonmetallic channel; and seal, nonmetallic, special shaped section. For circular (with aperature) nonmetallic items with a solid round cross-section see o-ring. Excludes cup, compression; gasket; washer (as modified); and felt, mechanical, preformed.
Classification: Gaskets,washers & other seals
NSN 5920-00-985-5090
NSN 5920-01-021-5198
NSN 5855-01-509-3112
NSN 5905-01-255-0087
NSN 5990-01-094-7740
NSN 6650-01-122-0169
NSN 7035-01-327-4456
NSN 5960-00-055-8010
NSN 5925-01-357-1308
NSN 5985-00-203-5884
NSN 6610-00-794-4967
NSN 5985-01-459-8441