Bi-Metal Self Drilling Screw

Bi-Metal Self Drilling Screw is a completely corrosion-resistant stainless steel self-drilling screw. The screw head and tail (13-30mm) are made of special carbon steel; the tapping part and the tip of the tail are made of alloy steel or (410 stainless steel). After special treatment. Anti-corrosion and corrosion-resistant life can achieve good results. Since the thread drill and the tapping area are all specially hardened metal, when the steel plate is tapped, the stainless steel part is introduced into the thread, which completely eliminates the phenomenon that the stainless steel tapping screw is often locked due to thread wear and deformation, and achieves a perfect conclusion. And has a high coefficient of drawing strength.