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.
Spain 
Canada 
France 
Germany 
Republic of Korea Classification: Gaskets,washers & other seals
NSN 6645-01-616-8996
NSN 5965-01-463-8176
NSN 5935-01-407-2554
NSN 5910-01-491-4287
NSN 6145-01-352-0703
NSN 6650-00-161-4122
NSN 5990-00-816-1580
NSN 6105-01-212-3394
NSN 5905-01-513-6113
NSN 4140-01-055-6355
NSN 5835-01-632-6627
NSN 6105-00-795-9447