With the Spax chipboard screw 6 x 40 mm, you achieve strong and dependable timber connections in outdoor and damp environments. Made from A2 stainless steel, it provides dependable corrosion resistance for cladding, fencing, and garden furniture. The full thread across the entire 40 mm length delivers maximum pull-out resistance and a secure hold. Thanks to the t-star plus T30 drive, you get optimal bit engagement without slipping or cam-out, while the countersunk multi head countersinks cleanly and flush into the timber without splitting the surface. This allows you to work quickly, neatly, and with full control.