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.
Italy 
Greece 
Turkey Classification: Gaskets,washers & other seals
NSN 5935-01-228-4606
NSN 6620-01-360-4725
NSN 5835-01-192-4165
NSN 6610-01-274-2479
NSN 6620-00-575-9230
NSN 5925-01-196-7878
NSN 5835-01-463-2334
NSN 4140-01-641-6633
NSN 5925-01-546-3408
NSN 6620-00-244-0965
NSN 6110-00-257-1446
NSN 6320-01-379-1182