8-18X1/2 6 Lobe Pan Serrated Full Thread Self Drilling Screw Zinc (Pack Qty 10,000) BC-0808KTPS

6 Lobe Pan Serrated Full Thread Self Drilling Screw Zinc

Type BSD: A tapping screw with spaced threads and a drill point which drills its own hole. Type CSD: A thread forming screw with machine screw thread pitch and a drill point which drills its own hole. Both types allow the screw to form mating threads and produce a complete fastening system in a single operation