... railway material in China, we have our own R & D department, production lines and inspection centre, ... Rail Clamp/ Clamp Plate; 5) Railway Cast Shoulder; 6) Track Spike, Screw Spikes, Bolts and Nuts, Washers ... Material: Q235, 35#, 45#, 40Mn2, 20MnsiGrade: 4.6, 5.6, 8.8Surface: Plain (oil), black, zinc, hdg, ... 9Surface: Plain (oil), black, zinc, hdg, etc. 6. Tie Plate /Base Plate /Bearing Plate/Rail Plate/ ...