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 4140-01-121-3980
NSN 5965-01-320-1808
NSN 5945-01-296-2324
NSN 5855-01-068-3683
NSN 5999-01-099-6671
NSN 6620-01-502-9104
NSN 5990-01-184-6830
NSN 6145-01-197-9558
NSN 5990-01-627-8097
NSN 6135-00-917-1894
NSN 5965-01-449-4606
NSN 6685-01-082-3764