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 4140-00-480-2592
NSN 5945-01-553-5953
NSN 5905-00-420-0453
NSN 6240-01-318-9356
NSN 5855-00-821-7512
NSN 7035-01-479-1840
NSN 5975-01-358-5972
NSN 6240-01-373-2686
NSN 6105-01-268-9380
NSN 5945-01-328-8463
NSN 5965-01-114-9086
NSN 5999-01-500-2107