... Ability:40000 Quick Details Place of Origin: Zhejiang China (Mainland) Brand Name: SDL Model Number: type torshear high strength bolt Surface ... Specifications high strength bolt: 1.Materials:1045/5140/35Cr-Mo 2.Surface: Black, ZP, HDG,Plain 3. Size: M5- ... customer demand. 1.Materials: Q235,45#,40Cr,35CrMoA,Q345D,etc. 2.Surface: Black, zinc-galvanization, hot dip galvanization, electro galvanization, ...