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 6320-01-521-1764
NSN 6650-01-150-5457
NSN 5999-01-231-6512
NSN 6610-00-360-2713
NSN 6135-00-643-4843
NSN 5855-01-486-2346
NSN 4140-01-565-4330
NSN 6240-01-466-4718
NSN 5999-00-228-5980
NSN 5935-01-176-2632
NSN 5975-01-472-4201
NSN 6650-00-840-9758