General description Self-drilling screws designed for fixing plasterboard to wall and ceiling track systems, suitable for materials with a maximum thickness of 3mm. These screws feature a bugle head that minimizes the risk of damaging the board surface and are ideal for use with thicker gauge steel. Technical specifications Size: 4.2 x 75 mm Driver Bit Size: PH2 Included Items: PH2 S2 Bit (Qty 1) CE Standard: BS EN 14566:2008 Finish: Zinc Thread Diameter: 4.2 mm Head Type: Bugle Material: Carbon Steel Corrosion Rating: 1 (suitable for clean, dry & low humidity environments) Thread Length: 50 mm MDT: 3 mm Recess Type: Phillips Pack Quantity: 500 Point Type: Self-Drilling Pack Type: Box Thread Type: Self-Tapping Partially threaded