Flat Head Slotted Drive Machine Screw DIN963 Wenzhou Jianhong Machinery Co., Ltd. Base Info Material:Carbon Steel,Stainless SteelType:Countersunk HeadHead Style:Counter Sunk BoltStandard:DINGrade:4.8,8.8,10.9 Description Pre:Mushroom Head Nib Bolt (guardrail bolt) Next:High Strength Hex Bolt Hexagon Bolt DIN933