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 2925-01-423-3003
NSN 6240-01-246-4258
NSN 6150-01-340-5165
NSN 5985-01-020-5374
NSN 4140-01-651-9557
NSN 5999-01-607-2833
NSN 5930-01-167-8177
NSN 5915-01-452-1902
NSN 6240-00-843-0698
NSN 5965-01-084-6921
NSN 5835-00-129-9913
NSN 6620-00-321-0134