Drill screw countersunk

Drilling and self-tapping screw. The screw drills its own hole and presses threads into the material. Design for steel material. Drill capacity up to 4.3 mm material thickness in steel. Version: B thread, countersunk head with Phillips cross track. The drill tip has spiral drill geometry, which provides exact control and fast start. Other: Rotation speed 1800-3000 rpm.