Metal Teks® self-drilling screws have a hardened drill point that drill and thread in structural steel and mild steel.

Usage tips include:

• The point must be in perfect diameter ratio in relation to the thread, so as to not overdrill
• The point must have a swarf flute longer than the total thickness of the steel being drilled
• It is important that the drill point has completed drilling the total thickness of the steel before the thread engages

To choose the correct fastener, it is necessary to select one where the length of the drill point is equal to or greater than the total thickness of the material to be drilled including the air-gap.

If the drill point is less than the total thickness of the material and the thread engages, then the fastener can break or become impossible to drive.