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Power Tools Direct£6.74Visit shop Timco 12180Cb Carriage Bolts & Hex Nuts - Zinc M12 X 180 Box 10
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B&Q£11.99Visit shop B&Q - Zinc Carriage Bolt M12 X 180mm Carbon Steel Domed Head Square Anti-Spin Shoulder For Clamping Timber Ironmongery Home Diy
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The TIMco 12180CB Carriage Bolts and Hex Nuts are essential fasteners designed for construction professionals and DIY enthusiasts who need secure, high-strength connections for heavy timber projects. These M12 x 180mm grade 4.8 carbon steel bolts feature a specialized square anti-spin shoulder that prevents rotation during tightening, making them ideal for mounting ironmongery or structural beams. While their BZP (Bright Zinc Plated) finish offers reliable corrosion resistance for interior and protected exterior use, they are not intended for marine or highly corrosive environments.
| Model Part Number | 12180CB |
|---|---|
| Brand | TIMco |
A 12mm drill bit is recommended to ensure a secure fit that allows the anti-spin shoulder to engage properly.
They are suitable for sheltered outdoor use, but they are not recommended for direct, unprotected exposure to wet, salty, or coastal environments.
The domed head has a diameter of 30.00mm.
Yes, each box of 10 bolts includes the corresponding hex nuts.
No, at 180mm length, these have 150mm of threading.
Ensure the pilot hole is not too large and that the square shoulder has been properly tapped into the wood with a mallet.
Check the thread for debris or paint chips; clear the threads and try again. Never force it, as you may cross-thread the bolt.
To install, mark your drill points accurately. Use a 12mm drill bit to create a clean pilot hole through the timber. Insert the carriage bolt and tap the dome head gently with a rubber mallet until the square shoulder is fully embedded in the wood. Once seated, hand-thread the hex nut onto the bolt, then finish tightening with a 19mm socket or wrench.
While the BZP finish is durable, avoid using these bolts in direct contact with treated timbers that contain high levels of copper or other corrosive preservatives, as this can accelerate the breakdown of the zinc coating. Keep them stored in a dry environment to prevent premature white rust before installation.
