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 5990-01-421-3325
NSN 5999-00-390-9948
NSN 6130-00-352-2317
NSN 6645-00-678-9656
NSN 5960-01-531-9108
NSN 6645-01-386-6311
NSN 5945-01-089-5803
NSN 4140-00-409-8298
NSN 5998-01-397-4688
NSN 5925-01-366-9842
NSN 6685-00-224-5310
NSN 6240-01-477-8728