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 4140-01-556-0323
NSN 5975-00-942-1925
NSN 5855-00-912-3885
NSN 5990-01-309-3740
NSN 6145-01-050-7531
NSN 6220-01-166-0004
NSN 2925-01-527-8745
NSN 6645-00-847-3727
NSN 5999-00-566-9440
NSN 5920-00-476-0528
NSN 5905-00-781-1870
NSN 5920-01-544-9121