Optical Screw (CES011) China Eyewear Screw Co., Ltd. Base Info Model NO.:CES011Material:Carbon SteelType:Hexagon HeadHead Style:RoundConnection:Common BoltGrade:4.8Trademark:China Eyewear ScrewOrigin:China Description Pre:Optical Screw Wheel Kits Next:Hex Bolts 4.8/8.8/10.9/12.9/A2/A4