Products Info. Commodity name: HEX BOLTS ASTM A307 Trademark:SD Standard:ASTM Material: Low Carbon Steel Property Grade:A/B Diameter:1/4”-1 1/2” Length:1 1/2”-12” Surface Treatment:Plain/Black Finish/Zinc(Cr3+) Plated /Hot Dipped Galvanized (H.D.G)/Dacromet ,etc.According to the Customer’s request. Heat Treatment:Not Need Heat Treatment Head Type:Hexagonal Payment term:T/T, L/C Business type:Manufacturer, trading 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!