... as customer demand. 1.Materials: Q235,45#,40Cr,35CrMoA,Q345D,etc. 2.Surface: Black, zinc-galvanization, hot dip galvanization, electro ... galvanization,plain 3. Size: M5-160 and according to customers' requirements4. Grade: 8.8,10.9,12.9 ... ' drawings and requirements.6. Payment:L/C,T/T >> Apply to railway, highway, bridge, boiler with steel structure,industry workshop,high ...