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 5990-01-011-7447
NSN 6650-01-564-3452
NSN 6650-01-548-1953
NSN 4140-01-143-7180
NSN 5996-01-582-7251
NSN 2925-00-314-0252
NSN 6320-01-227-2648
NSN 5835-01-247-2634
NSN 5945-01-304-5936
NSN 5905-00-532-6782
NSN 5935-01-012-3082
NSN 6650-00-143-1889