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 
Spain 
Canada 
France 
Germany 
Netherlands 
Greece Classification: Gaskets,washers & other seals
NSN 5895-01-412-3317
NSN 5990-01-087-3103
NSN 5998-00-004-1869
NSN 5999-01-449-0418
NSN 5985-01-314-1583
NSN 5905-01-649-5802
NSN 5950-00-345-9052
NSN 6620-01-616-3303
NSN 6220-01-262-2209
NSN 5905-00-470-9561
NSN 5999-01-006-9942
NSN 5975-00-252-7768