Roofing Bolts with Square Nuts - Zinc Plated - Box (200) - M8 x 20mm

• Double slotted roofing bolt complete with square nut.
• Finish: Zinc Plated. Fully threaded.
• Low profile cross slotted mushroom head.
• Clearance hole size is usually 1mm more than the bolt diameter.
• Suitable for both interior and exterior use.
• Can be used on many DIY projects other than roofing.