Yellow Zinc Chipboard Screw (C1022) Tianjin Ruiya Internation St Co., Ltd. Base Info Material:Carbon SteelType:Hexagon HeadHead Style:RoundConnection:Common BoltGrade:12.9Trademark:E-starOrigin:China Mainland Description Pre:Self-Drilling Screw with Wafer Head Next:Gypsum Screw With Fine Thread