Forgefix Coach Bolt & Nut - M6 x 40 - Bag 10 - White

M6 refers to the bolt's nominal diameter of 6 millimeters (mm) for the thread. The 'x 40' indicates the bolt's total length (excluding the head) is 40 millimeters.

Yes, these Forgefix coach bolts feature a zinc-plated finish, which provides good corrosion resistance and makes them suitable for most outdoor, low load-bearing applications like garden furniture and fencing.

Yes, drilling a pilot hole is essential. It ensures the bolt passes through easily, prevents timber splitting, and allows the square neck to properly embed and prevent spinning during tightening.

No, these coach bolts are designed for low load-bearing applications. For heavy-duty construction or critical structural elements, you should consult an engineer and use fasteners specifically rated for high loads.

You will need an electric drill with an appropriate-sized wood drill bit for the pilot hole, and a spanner or wrench to tighten the M6 hex nut.

The square neck prevents the bolt from rotating when it's inserted into timber. This allows you to tighten the nut from one side without needing a tool to hold the bolt head, making installation much easier, especially in tight spaces.

This usually indicates that the square neck of the coach bolt has not fully embedded into the timber. Ensure the pilot hole is correctly sized (slightly smaller than the square neck) and tap the bolt head gently with a hammer to fully seat the square neck before tightening the nut.

The pilot hole may be too small. Remove the bolt and re-drill the pilot hole using a slightly larger drill bit. Ensure the drill bit is still smaller than the square neck to allow it to bite into the wood.

For outdoor or vibrating applications, consider using a locking washer (e.g., a spring washer or a Nyloc nut) in conjunction with the standard hex nut to help prevent loosening due to movement or environmental factors. Re-tighten periodically as part of routine maintenance.