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Pan framing head self drilling screw
Diameter: 3.5mm(#6),3.9mm(#7) Length: 11mm(7/16") Coating: Zinc,PhosphatedMaterial: C1022
Self-drilling screws mainly has three advantages as following:
Firstly, Self-drilling screws can save labor. Drilling hole, forming mating thread and clamping home can achieve in an easy operation. It doesnt require for difficult alignment of two or more elements.
Secondly, self-drilling screws can save materials. It only needs one tool for application---screw drive. Power drills, drill bits and elaborate and costly press tools and their maintenance are eliminated.
Finally, self-drilling screws can improve product quality. It ensures correct hole size every time, resulting in better thread engagement and tighter clamp