Product Overview:
Roofing Bolts are specialized fasteners primarily designed for joining thin-sheet materials, cable tray systems, and corrugated roofing sheets. Featuring a distinctive large, flat "mushroom" head, they provide a broad bearing surface that distributes clamping pressure across thin substrates, preventing the bolt from pulling through. Typically supplied as a set with a square or hex nut, they are essential for light-to-medium duty construction and assembly.
Manufacturing & Technology:
Cold Forging Process: Precision cold-heading technology is used to form the mushroom head and shank, ensuring high dimensional accuracy and grain flow alignment for structural strength.
Thread Engineering: Features deep, clean metric or imperial threads designed for rapid assembly and high vibration resistance.
Surface Coating: Available in Zinc Plated (Clear/Yellow) for internal use or Hot-Dipped Galvanized for long-term atmospheric corrosion resistance in outdoor roofing environments.
Drive System: Usually equipped with a deep cross-recess (Phillips) or slotted drive to allow for high-torque manual or power installation.
Technical Parameters:
Material: Grade 4.8 or 8.8 Carbon Steel / Stainless Steel A2.
Head Type: Mushroom / Truss Head.
Diameter Range: M5 to M12 (Standard M6 is most common).
Length: 12{mm} - 100{mm}.
