5.5mm X 55mm Hex Head Self Drilling Roofing Screw Mild Steel with Zinc plating (Dia:5.5mm Length: 55mm)

Thread diameter: 5.5mm
Length: 55mm
Material: Mild Steel
Finish: Zinc
Drive: Hex

Hex Head Self-Drilling Roofing Screw (Zinc Plated) is made from high-strength mild steel and designed for fast, secure fixing in roofing and cladding applications. Its self-drilling tip eliminates the need for pre-drilling, allowing direct fastening into metal sheets and structures.

What makes this screw unique is the integrated flange under the hex head, which distributes load evenly and provides a firm clamping surface. Beneath the flange, a bonded rubber washer creates a weather-tight seal, preventing water leakage and protecting against vibration. The zinc plating enhances corrosion resistance, making it suitable for outdoor roofing, sheet fixing, and industrial installations where durability and leak-proof performance are critical.