Grade 8.8 10.9 12.9 M30 Double End Thread Stud Bolt Hebei Chengyi Engineering Materials Co., Ltd. Shape of Head:RoundSurface Finishing:Yellow Zinc,Galvanized, Black Oxide,PhosphateCertification:ISO, SGSCustomized:CustomizedSample:ProvideOEM:OEM Welcome Base Info ODM:ODM WelcomeFeatures:Good Anti-Corrosion AbilityDrive Type:Hexgon HeadSurface Treatment:Black OxideMaterials:Stainless Steel, Carbon SteelOther Name:Hanger BoltHead Type:Flat Head,Sharp Head,Double Ended Thread ScrewSize:AllTransport Package:Box , Bulk Packing , PalletSpecification:M1-M12Trademark:ChengyiOrigin:Hebei, ChinaHS Code:7318159090Production Capacity:600 Tons , Month Description Overview Product DescriptionDetailed PhotosCompany ProfileCertifications FAQ Pre:Double-End Stud Bolt DIN 976 Stud Bolt Next:Grade 12.9 DIN933 934 High Strength Hot DIP Galvanized Hex Bolt