The CLSA4 is a double threaded screw suitable for use with timber cladding. The screw consists of type 17 point to prevent timber splitting on insertion and flat head with fiber lock technology which prevents moisture getting into the timber. The double thread ensures sufficient insertion, even in high density wood without the risk of spin-off. It also helps pull the cladding tight to the frame. The CLSA4 screw is made from A4 stainless steel and therefore suitable for use in outdoor environments and extreme weather conditions.