SPAX Exterior New Construction Window Installation Screws provide a faster, easier, and more reliable alternative to nails for installing new construction windows from the exterior through the window flange. Designed for wood, vinyl, and composite flanges, these screws deliver precise placement and controlled driving to help maintain long-term window alignment while reducing the risk of damage caused by missed hammer strikes. Unlike nails, SPAX screws pull tight and resist withdrawal for a secure fit that minimizes movement, rework, and callbacks. The low-profile wafer head sits flush against the window flange and matches the diameter of a standard roofing nail, delivering increased clamping force and a clean, professional finish. A T-Star drive ensures secure bit engagement to reduce cam-out and stripping, while thread serrations lower driving torque for faster, smoother installation. Featuring the patented 4CUT point, these screws require no pre-drilling, reduce edge and end distances, and help prevent splitting when fastening through the window flange into the main framing member - outperforming traditional Type 17 screws. Finished with SPAX HCR-X coating, these screws provide long-lasting corrosion resistance for exterior applications. Ideal for professional contractors and DIYers seeking confident, professional-level results.