1 . 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)
2. Whichever name is utilized, these names are for screws that structure mating strings (“tapping” the strings) in a pre-penetrated gap in the substrate into which they are driven. A Self-Drilling Screw is a Self-Tapping Screw with the additional element of a drill point. … In the event that a screw will penetrate its own gap it is a Self-Drilling Screw.
3.The protected Thunder-Shot Drill Point gives quick and consistent drill performance,effectively clears swarf, and penetrates through 12.5mm thick steel .Phillips pan head self drilling screws have a sheet steel thread with a self driller slicing (TEK) factor to pierce thru 20 to 14 gauge metals. The greater the TEK quantity the large the drill factor to pierce heavier gauge metals. The heads use a phillips driver #1, #2 or #3 relying on the measurement of the screw. These screws are used in the exterior elements.
4. Some self-tapping screws are additionally self-drilling, which skill that, in addition to the tap-like flute in the main threads, there is additionally a preliminary drill-like fluted tip that appears a great deal like the tip of a middle drill. These screws mix a thrilling-like motion and the fastener set up itself into solely one using movement (instead of separate drilling, tapping, and putting in motions); they are hence very environment friendly in a range of hard-substrate applications, from meeting traces to roofing.
(High) Hex Washer
Head : Washer face
provides a bearing
surface for the driving