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.
Brazil 
Spain 
France 
Republic of Korea 
Portugal Classification: Gaskets,washers & other seals
NSN 5998-01-453-1162
NSN 6130-01-350-0331
NSN 6620-00-153-0982
NSN 5915-01-480-9643
NSN 5910-01-559-6137
NSN 5965-01-456-1731
NSN 5996-00-147-4120
NSN 6130-00-967-0475
NSN 5905-01-077-3062
NSN 5835-01-250-2939
NSN 5999-01-112-8854
NSN 5965-00-784-9409