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 5935-01-476-8026
NSN 5965-01-533-4851
NSN 5999-01-341-3179
NSN 6220-01-450-9505
NSN 5930-01-340-8398
NSN 5965-01-371-1297
NSN 5905-01-323-4064
NSN 5855-00-532-0025
NSN 5985-00-893-4919
NSN 6105-01-325-1653
NSN 2925-01-077-6867
NSN 5996-00-929-6762