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 6135-01-502-3807
NSN 6130-01-350-9124
NSN 4140-01-591-4012
NSN 4140-00-237-0816
NSN 5905-00-468-8008
NSN 5965-01-323-0501
NSN 6685-00-720-3155
NSN 6320-01-271-0247
NSN 6685-01-371-1624
NSN 6320-01-512-2031
NSN 5999-01-655-3484
NSN 6240-01-470-3451