8号铁丝直径为4.064mm。铁丝常见规格有0号铁丝,直径8.23mm;1号铁丝,直径7.62mm;2号铁丝,直径7.01mm;3号铁丝,直径6.401mm;4号铁丝,直径5.893mm;5号铁丝,直径5.385mm;6号铁丝,直径4....