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The Range£8.34Visit shop Unifix Grade 4.8 Mushroom Head Roofing Bolts And Sq Nuts Bright Zinc Plated - M10 X 180 (Box Of 15) - Silver
Visit shopThe Range£9.51Visit shop Unifix Grade 4.8 Mushroom Head Roofing Bolts And Sq Nuts Bright Zinc Plated - M6 X 180 (Box Of 50) - Silver
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The Unifix Grade 4.8 Mushroom Head Roofing Bolts are ideal for professional contractors and DIY enthusiasts needing a secure, heavy-duty fastening solution for roofing and structural timber projects. These M8 x 220 mm bolts provide exceptional stability and corrosion resistance due to their bright zinc-plated steel construction, though users should note that the 220 mm length is designed for thick material applications and may require cutting for thinner surfaces.
| Colour | Silver |
|---|---|
| Model Part Number | 5014196003818 |
| Brand | Unifix |
These bolts are M8, meaning they have a metric diameter of 8 mm.
Yes, each box of 25 bolts includes the corresponding square nuts for every bolt.
Yes, the bright zinc-plated (BZP) finish provides good protection against rust and corrosion for standard outdoor roofing projects.
This refers to the tensile strength of the steel, making it a standard grade suitable for general construction and fastening.
These are not recommended for marine use, as salt water can quickly corrode the zinc plating.
Ensure the pilot hole is at least 8.5 mm to account for the bolt diameter and coating thickness.
Square nuts are designed to be tightened with a wrench or socket; do not attempt to tighten by hand.
If the finish is scratched during installation, touch up the area with a cold-galvanizing spray or exterior-grade metal paint.
For installation, ensure you have the appropriate size wrench or socket set to accommodate the M8 bolt and its square nut.
