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 7035-00-166-0339
NSN 4140-00-182-9158
NSN 5975-00-426-0657
NSN 7035-01-319-7066
NSN 5945-00-816-3364
NSN 5925-01-448-1906
NSN 5920-01-209-2219
NSN 5960-01-066-9024
NSN 6145-01-130-5416
NSN 6685-01-630-0729
NSN 5915-01-187-8588
NSN 7035-01-160-4423