A Roofing Bolt and Nut is a fastener set specifically designed for fixing corrugated roofing sheets (metal, plastic, or asbestos) to structures like sheds, warehouses, or industrial roofs

Key Features:

🔩 Roofing Bolt:

• Head Type: Large, mushroom or dome-shaped head
  → Wide surface area to prevent pull-through and distribute load.

• Neck: Often square under the head to prevent rotation while tightening.

• Shank: Fully or partially threaded

• Material: Galvanized steel, stainless steel, or mild steel

• Finish: Zinc plated or hot-dip galvanized for corrosion resistance

🔩 Nut:

• Typically a hex nut, matching the bolt's thread

• May come with washers (flat or sealing washers) to ensure waterproofing

Advantages:

• Wide head eliminates need for separate washer in many cases

• Ideal for securing soft or thin roofing materials

• Resistant to loosening in high-vibration or wind-prone areas

• Corrosion-resistant versions available for outdoor use

Common Applications:

• Corrugated sheet roofing

• Polycarbonate and PVC sheet installations

• Greenhouses, sheds, farm buildings

• Temporary shelters and industrial roofs

Available Sizes (examples):

• Diameter: M5, M6, M8 (Metric); or 1/4", 5/16" (Imperial)

• Length: 20mm to 100mm or more, depending on material thickness

Optional Accessories:

• Rubber/neoprene washers – for waterproofing

• Sealing grommets – for metal roofs

• Spring washers – for vibration resistance

Would you like:

• A diagram or drawing of a roofing bolt?

• A size chart or selection guide?

• Details about how to install them properly?