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 
Australia 
France 
United Kingdom 
Portugal 
Denmark Classification: Gaskets,washers & other seals
NSN 5925-01-234-6912
NSN 5915-01-528-2523
NSN 5985-00-104-5981
NSN 5935-00-136-7524
NSN 5895-00-351-1988
NSN 6135-01-238-2878
NSN 5915-00-104-1403
NSN 5998-01-547-0299
NSN 6145-01-280-1790
NSN 5965-01-105-7901
NSN 5905-01-093-3095
NSN 6240-01-537-6384