Product Info. Model NO:DIN 975 Type: Round Head Head Style: Round   Material:  High Strength Steel Standard: DIN Trademark: SD Export  Markets : USA, Canada, Brazil, U. K., France, Germany, Spain, Italy, Switzerland, Dubai, Singapore, Malaysia, Japan, Korea. etc. Property Class: Cl. 4.8/6.8/8.8 Diameter: M6-M52 Surfaces: Plain, Black, Zinc (ZP), Yellow Zinc Plating (YZP), Hot Dipped Galvanized (H.D.G), Dacromet ,etc.According to the customer’s request. Heat Treatment:CL.4.8/6.8 Not Need Heat Treatment&CL.8.8 Need Heat Treatment Advantages： -Competitive Price! -Well and High Quality Control! -Satisfactory Service! -OEM service available! -Customer’s Design and Logo are Welcome!