... Spec:DIN,JIS,ASTM,GB,UIC 2.Surface:black, HDG 3.Grade:4.8,8.8,10.9,12.9 4.Material:Q235 ... ,45#,40Cr ASTM DIN GB Standard High strength 12.9 bolt grades with large ... 7416, JIS B 1186, ASTM A325, ASTM A490, GB/T 1228, GB/T 1229, GB/T 1230 III. Usage:Supply to railway, highway ... Products: Factory view figures: Welcome your visit! ASTM DIN GB Metric High strength hex head 12 ...