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 6620-01-199-7570
NSN 6645-01-461-3725
NSN 6645-00-107-2148
NSN 5925-00-517-8512
NSN 6145-01-012-2098
NSN 5905-01-165-9859
NSN 5945-00-578-9283
NSN 5998-01-510-7495
NSN 6145-01-113-8205
NSN 5996-01-062-7229
NSN 5945-00-258-6605
NSN 5999-01-154-0563