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 4140-01-018-9137
NSN 6135-01-559-9637
NSN 6130-01-513-5112
NSN 5855-00-896-4047
NSN 5965-00-954-3011
NSN 6220-01-474-0033
NSN 6150-01-161-9424
NSN 6685-00-296-0392
NSN 4140-00-924-8116
NSN 6130-00-287-5750
NSN 6620-01-473-5163
NSN 5975-01-660-7171