Black Zinc Flat Head LEDA METAL CO. Base Info Material:Carbon SteelType:Hexagon HeadGroove:WordConnection:Common BoltHead Style:HexagonalStandard:DIN, GB, ANSI, BSW, JISGrade:8.8Transport Package:Freight AirSpecification:M1.2-M10 Description Pre:P Head Machine Screw Next:All Size Black Carbon Steel Flange Bolts with Cheap Price