Hex Head Self Drilling Screws for Light Section Steel

This 5.5mm x 45mm hex head self drilling screw is the longest option in the range, making it well suited to applications where additional penetration depth is required — such as fixing thicker roofing sheet profiles or multi-layer assemblies to light gauge steel purlins. No pre-drilling is needed, allowing for fast, efficient installation. The hex head with integral washer distributes clamping pressure evenly, reducing the risk of sheet deformation and improving weathertightness. The coarse thread bites firmly into light section steel, while the zinc plating provides reliable corrosion resistance for external roofing use. Supplied in a pack of 500.