... grade steel bolts. Steel bolts for the main power system, the machinery industry, the pharmaceutical industry, pharmaceutical plants and steel boiler steel. System ... SELF COLOUR, BLACK,ZP,YZP,H.D.G, DACROMENTMaterials:high quality carbon steel (C1015,C1035,C1045etc)Alloy steel:20 MnTiB ... ASME B18.2.3.7Product name: Track bolt and nut Model: As per machine Material: 40Cr Processing: Forging Size: M12* ...