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 6620-01-440-9810
NSN 6650-01-610-6739
NSN 5975-00-926-7563
NSN 5930-00-388-6758
NSN 5990-01-013-8464
NSN 6150-01-406-5400
NSN 5996-01-429-0390
NSN 5835-00-997-4680
NSN 5915-01-494-0307
NSN 5990-01-212-2037
NSN 2925-00-833-9466
NSN 4140-01-468-5962