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 6135-01-540-9655
NSN 5915-01-547-0546
NSN 5915-01-209-8891
NSN 6610-00-331-3460
NSN 5925-00-683-7877
NSN 7035-01-564-7662
NSN 4140-00-071-2209
NSN 5998-01-432-1007
NSN 6150-01-210-8887
NSN 5895-01-360-9472
NSN 5999-01-245-1332
NSN 5985-01-518-5138