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.
Spain 
Singapore 
Canada 
France 
Germany 
Republic of Korea 
Netherlands 
Greece Classification: Gaskets,washers & other seals
NSN 6110-01-472-1963
NSN 6685-01-113-8005
NSN 5935-00-138-4230
NSN 6110-01-098-4803
NSN 5960-01-243-0007
NSN 5965-00-134-0883
NSN 7035-01-322-0221
NSN 5996-01-359-0057
NSN 5965-00-725-4453
NSN 5998-01-169-3647
NSN 5915-01-196-1846
NSN 5999-01-218-5740