Detailed Product Description Threaded Rods1) Standard: :DIN975,DIN976 2) Material: Carbon steel 3) Grade: Grade 4.8, grade 8.8 4) Dimension: M3--M56,1/4-20----2"--45) Length: 20----40006) Coating: Nature, Zinc plating, blackening, hot dip zinc, environment-friendly zinc plating