Standard:DIN Standard:DIN,ASME,ASNI,ISO Material:Carbon Steel:Grade 4.8,Grade 8.8,Grade 10.9,Grade 12.9 Certificate:ISO9001:2008,SGS,RoHS Name:Grade 4.8 Carbon Steel Black Zinc Plated Hex Socket Button Head Screw Grade:Grade 4.8,Grade 8.8,Grade 10.9,Grade 12.9 Finish:Zinc Plated,HDG,Dacromet,Nickel Plated,Black Oxide,Plain Port:Shenzhen Show More