... 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 hexagon head for steel ... DIN 931, ISO 7412, ISO 4775, ISO 7416, JIS B 1186, ASTM A325, ASTM A490, GB/T 1228, GB/ ... Pictures:1. Certificate 2. Various honorary certificates3. Product12.9 grade high strength bolts 4. Factory view figures:packaging factory ...