Specially designed flange head with Phillips drive, these are 4.8mm carbon steel screws that enable the joining of bay window PVCu sections as well as other PVCu applications. Sizes ranging from 50mm to 80mm to suit a wide range of needs for the installation of windows. All of our screws are plated with anti-corrosion zinc that provides a durable high standard finish. Baypole screws have self-drill tips, which saves installation time, as it means no more pre-drilling as the drill-shape tip can cut through soft steels and other materials.