Unifix Coach Screws - Hexagon Head - DIN 571 BZP - M12 x 80

BZP stands for Bright Zinc Plating. It provides a protective layer that resists corrosion and rust, extending the lifespan of the screw, especially in outdoor or damp conditions.

These coach screws are designed primarily for wood applications. For metal or concrete, you would need to use fasteners specifically designed for those materials, potentially with appropriate anchors or inserts.

An M12 coach screw typically requires a 19mm (or 3/4 inch) wrench or socket for tightening.

This product comes in a pack of 20 coach screws.

For an M12 screw in softwood, a pilot hole of approximately 10mm is generally recommended. For hardwoods, you may need a slightly larger pilot hole.

Yes, their durable construction and size make them suitable for many structural wood applications, but always ensure the wood itself can support the load and follow relevant building codes and engineering guidelines.

Ensure you have drilled an appropriate pilot hole. If the wood is very hard, the pilot hole may need to be slightly larger or deeper. Check for any obstructions in the hole.

Ensure you are using the correct size socket or wrench. Apply steady, even pressure. If stripping occurs, stop and try to remove the screw carefully. Consider using a screw extractor if necessary.

The pilot hole might be too large, or the wood may be too soft. Try removing the screw and using a slightly larger diameter screw if possible, or re-drilling and using a wood dowel or filler to create a more solid anchor point.

While BZP offers good resistance, prolonged exposure to moisture or harsh chemicals can eventually cause corrosion. For critical structural applications in harsh environments, consider stainless steel alternatives or apply a protective coating.