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.
Austria 
Brazil 
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France 
Netherlands Classification: Gaskets,washers & other seals
NSN 5950-01-443-6364
NSN 5925-00-774-6528
NSN 6650-00-914-5074
NSN 5965-01-513-6540
NSN 5999-01-427-3702
NSN 7035-00-117-0418
NSN 6145-01-012-3975
NSN 5895-01-230-3960
NSN 4140-01-141-7692
NSN 6130-01-412-8570
NSN 6685-01-322-7474
NSN 6110-01-066-8038