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 5998-01-567-8110
NSN 5935-00-857-0948
NSN 6150-00-297-3928
NSN 6240-01-590-0197
NSN 6620-01-187-7267
NSN 6150-01-642-1855
NSN 5920-01-092-1148
NSN 6685-00-108-6374
NSN 7035-00-179-3924
NSN 5990-00-647-4008
NSN 4140-01-528-7945
NSN 5965-01-492-4728