Self drilling screws have a point that acts as a drill bit and sharp cutting threads that tap the hole during installation.
Self drilling screws are a commonly used variety of screw for quick drilling into both metal and wood.
A self drilling screw can typically be identified by its point and flute (notch) tip.
Industries that use self-drilling screws for metal fastening include automobile construction, building, and furniture manufacturing.
The design and construction of self-drilling screws allows them to pierce 20 to 14 gauge metals.
Self tapping screws tap their own thread, so they need a pilot hole slightly smaller than the screws diameter.
The idea is, you drill a pilot hole into wood or another soft material.
Then as you drive the tapping screw in, its threads will dig into the material keeping it secure.
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