M1.2 M1.4 M1.7 Black Countersunk Head Self-tapping Screws

The self drilling screws made of 410 stainless steel, high hardness (40 Rockwell C), steel process. Standard cross recessed flat head Screw, smooth and complete, with uniform force, difficult to prevent slip during rotation. The tail of the drilling screw is in the shape of drilling tail or pointed tail, without auxiliary processing, it can be directly drilled, tapped and locked on the setting materials and basic materials, greatly saving construction time. Relatively common screw, its high...