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 4140-01-141-6526
NSN 6650-01-500-1756
NSN 6240-01-438-8044
NSN 6135-01-390-7364
NSN 4140-00-200-9082
NSN 5990-01-361-4192
NSN 4140-01-448-0733
NSN 6130-01-262-3534
NSN 6685-01-335-6871
NSN 5835-00-859-8330
NSN 6105-01-491-0329
NSN 5930-01-378-2860