... Spec.: DIN,JIS,ASTM,GB 2. Surface: black 3. Grade:4.8,8.8,10.9,12.9 4. Material: Q235,45#,40Cr ASTM DIN GB Rail ... . 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 1228, GB/T 1229, GB/T 1230 ... packaging factory view Testing equipments Workshop Welcome your visit! ASTM DIN GB Metric rail hex head high tensile nut bolts