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 2925-01-285-7163
NSN 5990-01-321-2997
NSN 5975-00-459-8902
NSN 5998-00-473-2035
NSN 6130-01-043-4066
NSN 6240-00-606-5241
NSN 5960-01-094-5958
NSN 5965-01-050-1020
NSN 5905-01-575-6818
NSN 6130-01-508-5333
NSN 6105-00-716-3538
NSN 6110-00-144-3159