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 6240-00-157-8529
NSN 6150-01-178-4776
NSN 5999-01-576-9656
NSN 6130-01-506-0533
NSN 6620-01-204-2798
NSN 5920-00-583-8674
NSN 6320-01-415-0953
NSN 6145-01-253-0121
NSN 5999-01-394-0100
NSN 6240-01-295-9833
NSN 6135-00-078-9931
NSN 6620-01-258-8980