Whats the difference between a self-tapping screw and a self-drilling screw?
Technically, both screw types are “tapping” screws because both “tap” their own mating internal thread when driven into preformed holes. “Self-tapping” screws require that a pilot hole be pre-drilled through the panel and steel support member prior to screw installation. “Self-drilling” tapping screws have a drill point on the tip that allows the screw to drill, tap and fasten the panel to the steel support member in one operation. We also offer a sharp-point Woodtite screw that will pierce through the panel and fasten into a wood support member.
