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 6620-01-421-3917
NSN 5945-00-153-4427
NSN 5998-01-453-9989
NSN 5985-01-423-3171
NSN 6130-00-475-0336
NSN 6645-01-650-5735
NSN 6110-00-789-5594
NSN 5905-01-107-6301
NSN 6150-00-503-9234
NSN 6150-01-540-2372
NSN 5990-00-179-2576
NSN 2925-00-486-8640