6763: Bar & rods (excluding6761), iron or steel, cold-formed

67631: Bar & rods, of free cutting steel, cold-formed 67632: Rods, iron or non-alloy steel<0, 6%carbon, cold-form. 67633: Rods, iron or non-alloy steel>0, 6%carbon, cold-form. 67634: Bar & rods, of stainless steel, cold formed 67639: Rods, other alloy steel (excludinghigh speed, sili.), col. 6763: Bar & rods (excluding6761), iron or steel, cold-formed