Products Info. Standard ASTM Material Carbon Steel Grade A/B/C/DH/A563M 10S Surface Treatment Plain/Black Finish/Zinc（Cr3+) Plated /Hot Dipper Galvanized (H.D.G)/Dacromet ,etc.According to your request. Diameter Different Diameter available (1/4”-4”) Payment term T/T, L/C  Business type Manufacturer, trading Heat Treatment GR.A/B Not Need Heat Treatment,GR.C/DH 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!