Products Info. Model NO.:ASTM A194   Raw Material:Carbon Steel Head Style:Hexagonal Standard:ASTM Trademark:SD Diameter:1/4" -4" Heat Treatment: Need Heat Treatment High Tensile:Yes Surface Treatment:Plain/Black Finish/Zinc（Cr3+) Plated /Hot Dipped Galvanized (H.D.G)/Dacromet ,etc.According to the customer’s request. Export  Markets : USA, Canada, Brazil, U. K., France, Germany, Spain, Italy, Switzerland, Dubai, Singapore, Malaysia, Japan, Korea. etc.   Advantages： -Competitive Price! -Well and High Quality Control! -Satisfactory Service! -OEM service available! -Customer’s Design and Logo are Welcome!