[#10 x 2 10]

All self-drilling screws offer economical benefits: reduces labor and tooling costs; reduces or eliminates drill bits and taps. A tapping screw with spaced threads and a drill point which drills its own hole. This type allow the screw to form mating threads and produce a complete fastening system in a single operation. AISI 1016 - 1024 or equivalent steel Screws shall be quenched in liquid and then tempered by reheating to 625°F minimum. Rockwell C52 -58