Special Hex Head Self Drilling Screw
Category: Self Drilling Screws
Special hex head self drilling screws are almost always made out of hard steel or some metal that has been treated to increase its hardness (such as 410 stainless steel). Always make sure when using self drilling hex screws, the material you drill into is softer than the screw material itself. Otherwise, the screws drilling tip will dull and not cut into the material.
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