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 5996-00-578-3278
NSN 6650-01-567-8552
NSN 5910-00-301-1227
NSN 6320-01-039-5891
NSN 5960-01-081-7745
NSN 6685-00-823-7790
NSN 5935-01-367-1961
NSN 6150-00-257-5027
NSN 6240-01-615-8454
NSN 5855-01-372-9728
NSN 6650-01-383-4526
NSN 6620-00-608-1480