Products Info. Commodity Name: HEX NUTS DIN 6915 TRADEMARK:SD Main Standard: DIN Material: Carbon Steel Head Type:Hexagonal Property Class:HV-10 Diameter: M12-M36 Surface Treatment:Plain/Black Finish/Zinc（Cr3+) Plated /Hot Dipped Galvanized (H.D.G)/Dacromet ,etc.According to your request. Heat Treatment:CL.4.8 6.8 Not Need Heat Treatment&Cl.8.8 10.9 12.9 Need Hot Treatment 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!