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 5945-01-504-9310
NSN 5990-01-443-2931
NSN 6130-00-369-6637
NSN 6645-01-551-6893
NSN 5998-00-780-2993
NSN 5950-00-092-6341
NSN 4140-01-160-4403
NSN 5910-00-022-8185
NSN 5920-01-521-3087
NSN 5996-01-429-0390
NSN 5905-00-475-8341
NSN 5975-00-266-2029