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 6110-00-397-7531
NSN 6110-01-430-7238
NSN 6620-01-554-3987
NSN 5945-01-592-3379
NSN 5835-01-390-0880
NSN 5975-01-525-4047
NSN 6105-01-567-0810
NSN 5998-01-362-3680
NSN 6220-01-456-2017
NSN 2925-01-305-1370
NSN 4140-01-506-7844
NSN 6650-01-576-6512