Coach Screw - White - M8 x 100mm

For timber, a pilot hole typically between 4-6mm is recommended. The exact size can vary depending on the hardness of the wood; harder woods may require a slightly larger pilot hole to prevent splitting and ease driving. Always test on a scrap piece if unsure.

Yes, absolutely. The zinc plating provides enhanced durability and excellent corrosion resistance, making these coach screws ideal for outdoor applications like fencing, decking, and other external timber constructions.

You will need a drill for creating pilot holes and a socket driver (such as a spanner or socket wrench) of the appropriate size for the hexagon head (typically 13mm or 14mm for an M8 screw, please verify with the actual product).

Yes, they are suitable for masonry and concrete, but only when used in conjunction with appropriately sized and type-specific wall plugs. Drill a hole for the wall plug, insert the plug, then drive the coach screw into the plug.

DIN 571 is a German Industrial Standard that specifies the dimensions and material requirements for hex head wood screws, commonly known as coach screws or lag screws. Conforming to this standard ensures the product meets specific quality and performance criteria.

Zinc plating protects in two ways: it forms a physical barrier that prevents moisture and oxygen from reaching the steel, and it acts as a sacrificial anode. If the coating is scratched, the zinc corrodes preferentially to the steel, protecting the underlying metal from rust.

While an impact driver with a suitable socket attachment can be used, caution is advised. Impact drivers can generate very high torque quickly, increasing the risk of over-tightening, stripping the screw head, or damaging the material. Use a lower torque setting and apply controlled pressure.

The pilot hole may be too small or not deep enough for the material. Remove the screw, redrill with a slightly larger or deeper pilot hole, or ensure no debris is obstructing the path. For very hard timber, a slightly larger pilot hole may be needed.

Ensure you are using the correct size socket driver for the screw head. An ill-fitting socket or excessive force can cause stripping. Apply steady pressure and avoid using power tools on too high a torque setting without proper control.

The pilot hole might be too large, or the screw length/diameter may be insufficient for the application. Ensure the pilot hole is slightly smaller than the screw's core diameter. For masonry, verify the wall plug is correctly sized and fully seated.