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.
Brazil 
Spain 
France 
Republic of Korea Classification: Gaskets,washers & other seals
NSN 5895-01-411-6024
NSN 4140-01-400-3610
NSN 5920-00-554-0437
NSN 5960-00-344-9588
NSN 5855-00-138-2386
NSN 5905-00-082-1927
NSN 6145-00-655-2738
NSN 6610-01-194-8659
NSN 5930-01-386-5571
NSN 5960-01-420-3072
NSN 5950-01-014-7157
NSN 4140-01-568-9532