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 4140-01-370-3936
NSN 5895-01-134-1785
NSN 6135-00-851-8575
NSN 5965-00-330-9672
NSN 6110-00-518-2998
NSN 6105-01-422-7454
NSN 5985-01-541-8440
NSN 5990-01-548-5979
NSN 5930-01-227-1908
NSN 5999-00-506-4484
NSN 6150-01-207-1939
NSN 2925-01-591-4030