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 5990-01-317-4427
NSN 5999-01-015-3638
NSN 5935-01-007-6400
NSN 6105-01-004-7890
NSN 4140-01-467-1986
NSN 5835-01-426-6573
NSN 5990-01-138-8981
NSN 6645-00-397-2210
NSN 2925-01-226-6126
NSN 6150-01-646-2578
NSN 6650-00-949-8653
NSN 5960-01-467-0961