Type BSD is a tapping screw with spaced threads and a drill point which drills its own hole
#3 Drill Point; Appropriate for material thicknesses up to 0.21"
Description
Self-Drilling Screws, also known as Tek screws, eliminate the need for a pre-drilled hole. The length of the drill point determines the material thickness which the screw can reliably penetrate. When selecting a self-drilling screw design, it is important to consider the material thickness and type of materials to be joined. These stainless teks are great to use in environments that are damp.