Hillman No. 12-14 X 1 in. L Hex Hex Head Self- Drilling Screws 100 pk
Self Drilling screws are specifically designed to fasten metal sheeting with out drilling and have self tapping threads to provide a stronger grip to your surface. These drill into the roof to remove material and have a neoprene washer provide a water tight seal. These screws have a ceramic finish that is corrosion resistant and recommended for use for treated woods. *
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