... timber drive spikes, T-bolts, fish bolts, switch & crossing bolts, high tensile strength bolts for rail bridges etc.3, Various type ... international Co., Ltd are supplying all kinds of high quality products such as bolts, high strength bolts, screws, nuts, threaded rod, anchor ... SELF COLOUR, BLACK,ZP,YZP,H.D.G, DACROMENTMaterials:high quality carbon steel (C1015,C1035,C1045etc)Alloy steel:20 MnTiB 40Cr ...