Heavy-duty, self-drilling fasteners with an extra-long drill point, specifically designed to penetrate and fasten into thick, hot-rolled steel (up to 12mm) without pre-drilling. Featuring a 24 TPI (threads per inch) fine thread and a 5/16″ hex head, they are ideal for high-strength steel fabrication, roofing, and structural purlin applications.
Series 500 Screws (per screw)
$0.25
