General description The TIMCO Window Fabrication Screws are designed for attaching steel hardware to steel reinforced PVCu sections. Their self-tapping and self-drilling points ensure easy installation and a secure fit. Technical specifications Type: Pan head screws Material: Zinc Dimensions: 4.2 x 19 mm Usage Ideal for use in window fabrication Provides a firm clamping action due to the flat underside of the screw head