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 5905-01-113-6821
NSN 4140-00-283-6843
NSN 6320-00-261-9136
NSN 6610-00-500-0180
NSN 5960-01-350-5332
NSN 6240-00-972-4766
NSN 5965-01-160-7037
NSN 5920-00-736-7882
NSN 5910-01-477-6787
NSN 5960-01-445-3622
NSN 6620-00-613-3023
NSN 5905-00-242-2442