20x M5.5 Carbon Steel Color Zinc Plating Drilling Hexagonal Screws Dovetail

20PCS M5.5 Carbon Steel Color Zinc Plating Drilling Hexagonal Self Drilling Screws Dovetail Screws Padded Blacksmith Screw. Size: M5.5. It is wood drill tail screw, mainly used in steel structure caigang watt fixed, can also be used for fixing the simple construction of the sheet material.Standard hex washer head screw,can be easily installed.