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 5990-01-425-2175
NSN 5996-00-461-3416
NSN 5895-00-199-4964
NSN 5998-01-029-3547
NSN 6645-00-593-5420
NSN 6110-01-043-1796
NSN 4140-00-259-2567
NSN 5999-01-210-5309
NSN 6145-00-007-6429
NSN 2925-01-453-1606
NSN 6620-00-701-3575
NSN 5935-00-494-3406