Generally used for attaching steel hardware to steel reinforced PVCu sections. The flat underside of the screws head allows it to clamp the materials together firmly. Stainless steel should be used where there is a corrosive environment. Approval All tested to BS EN ISO 9227:2006. UKAS Accredited. In accordance with BS 7412 and both the BPF and GGF guidelines. Colour Silver Corrosion Rating 3 - Urban & industrial areas with a low salt atmosphere Description Generally used for attaching steel hardware to steel reinforced PVCu sections. The flat underside of the screws head allows it to clamp the materials together firmly. Stainless steel should be used where there is a corrosive environment. Driver Bit Size PH2 Finish Silver Organic Head Type Pan Length mm 25 Material Martensitic Stainless Steel (410) Max Drilling Thickness mm 3.0 Pack Dimensions L x W x H mm 180 x 90 x 90 Pack Weight kg 2.224 Point Type Self-Drilling Product Code 133SS Recess Type Phillips Size mm 4.2 x 25 Substrates Steel Thread Dia. mm 4.2 Thread Type Self-Tapping