carbon steel drive metal Roofing hex head self drilling ...
Hex Washer Head Self Drilling Screws (Zinc-Plated Steel) are designed for use in metal applications. Self-Drilling Screws, also known as Tek screws, eliminate the need for a pre-drilled hole. Like self tapping screws, self drilling screws cut threads while being installed. A self drilling screw, however, has a notched point that acts as a drill ...
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