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.
Classification: Gaskets,washers & other seals
NSN 5998-01-576-8857
NSN 5935-01-133-3941
NSN 6240-01-603-7856
NSN 6220-01-422-3602
NSN 5998-01-132-1483
NSN 5945-00-518-8963
NSN 6145-01-209-7469
NSN 6105-01-590-8972
NSN 6240-01-136-4694
NSN 5895-01-579-1665
NSN 6320-01-299-6367
NSN 4140-01-107-4597