... Detail: 20-45 days Specifications high strength bolt: 1.Materials:1045/5140/35Cr-Mo 2.Surface: Black, ZP, HDG,Plain 3. ... series standard products as customer demand. 1.Materials: Q235,45#,40Cr,35CrMoA,Q345D,etc. 2.Surface: Black, zinc-galvanization, hot ... bridge, boiler with steel structure,industry workshop,high civil buildings, hoisting machinery and so on. SETS OF TORSHEAR TYPE BOLTS AND NUTS\10.9 ...