Products Info. Standard DIN Material Carbon Steel Class 5/6/8/10 Surface Treatment Plain/Black Finish/Zinc（Cr3+) Plated /Hot Dipper Galvanized (H.D.G)/Dacromet ,etc.According to your request. Diameter Different Diameter available (M6-M60) Payment term T/T, L/C  Business type Manufacturer, trading Heat Treatment Cl.5/6Not Need Heat Treatment,Cl.8/10 Need Heat Treatment Notes Special specifications and marks can be made according to customers requirements; Main products bolts, screws, nuts,Threaded Rods etc. Advantages： -Competitive Price! -Well and High Quality Control! -Satisfactory Service! -OEM service available! -Customer’s Design and Logo are Welcome!