Allen Nylon Open Horn Cleats 64mm

Hi William, You will want a 3.2mm Countersunk screw, the cleat is 13mm high so you need that length before it even touches your batten then how deep do you want to go? A 25mm long screw will finish inside your batten or you could go longer and use a nylon wingnut on the back to offer more support https://www.tridentuk.com/gb/allen-nylon-wingnut-small-self-tapping-a129.html Regards David