Hex Head Self Drilling Screws for Light Section Steel

This 5.5mm x 25mm hex head self drilling screw offers a practical, mid-length fixing for attaching roofing sheets to light gauge steel. The 25mm length suits a broad range of standard sheet profiles and purlin configurations, making it a go-to choice for many roofing applications. No pre-drilling is required. The hex head with integral washer spreads the clamping force evenly across the sheet surface, improving pull-out resistance and weathertightness. The coarse thread grips firmly in light section steel, while zinc plating provides corrosion protection for exposed external use. Supplied in a pack of 500 for straightforward site management.