... .8,10.9,12.9 4. Material: Q235,45#,40Cr ASTM DIN GB Rail high tensile nut bolts with large hexagon head ... structuresII. Specification: DIN 6914, DIN 6916, DIN 7990, DIN 7999, DIN 931, ISO 7412, ISO 4775, ISO 7416, JIS B 1186, ASTM A325, ASTM A490, GB/T ... figures: packaging factory view Testing equipments Workshop Welcome your visit! ASTM DIN GB Metric rail hex head high tensile nut bolts