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 5930-00-206-0210
NSN 5985-00-643-2402
NSN 5905-01-044-6469
NSN 4140-01-250-7159
NSN 5930-01-364-0943
NSN 5945-01-082-9535
NSN 5998-01-624-9930
NSN 6610-01-297-1492
NSN 6105-01-357-4896
NSN 6130-01-434-4327
NSN 5985-01-437-9175
NSN 6645-00-893-4190