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 6240-01-390-2597
NSN 6645-00-443-8011
NSN 5990-00-754-2842
NSN 5920-01-136-8843
NSN 5950-00-266-9058
NSN 5905-00-887-8998
NSN 5998-00-223-0374
NSN 5965-01-360-0454
NSN 5930-01-418-7186
NSN 5930-01-094-2537
NSN 4140-00-012-3506
NSN 6150-01-571-8029