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.
Estonia 
Singapore 
Australia 
France 
Germany 
United Kingdom 
Netherlands Classification: Gaskets,washers & other seals
NSN 5950-01-174-1725
NSN 4140-01-366-4034
NSN 6620-01-383-6494
NSN 6685-00-682-7459
NSN 6650-01-015-7111
NSN 5905-01-650-3424
NSN 6240-01-609-2710
NSN 5905-01-661-0578
NSN 5920-01-519-3615
NSN 5930-01-261-6790
NSN 6610-01-099-9710
NSN 5920-01-124-7029