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 4140-01-476-4468
NSN 5925-00-333-7475
NSN 5910-01-387-7012
NSN 5990-01-400-3299
NSN 5920-00-817-2831
NSN 5935-01-189-1936
NSN 5975-01-198-9916
NSN 5920-01-608-4166
NSN 5975-00-807-6124
NSN 5965-01-248-6345
NSN 6110-01-494-5225
NSN 5895-01-644-6626