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 
Singapore 
France 
Republic of Korea 
Italy 
Greece 
Turkey Classification: Gaskets,washers & other seals
NSN 5925-01-215-2119
NSN 5975-01-181-7094
NSN 6145-01-602-9331
NSN 5835-01-026-0670
NSN 6105-01-050-5878
NSN 6610-01-559-5073
NSN 5930-01-435-2260
NSN 5950-01-657-1697
NSN 6685-01-425-2768
NSN 5999-01-446-5300
NSN 2925-01-255-6394
NSN 6650-01-308-5169