Diall Fine Metal & Wood Plasterboard Screw - Black

The black phosphate coating provides corrosion resistance, which helps to extend the life of the screws and prevent rust.

While the black phosphate coating offers some protection, these screws are best suited for indoor applications. For outdoor use, consider screws specifically designed for outdoor environments.

Use a drill bit slightly smaller than the diameter of the screw's core (the part without the threads). For the 3.5mm screws, a 2.5-3mm drill bit is generally appropriate, but test it first on a piece of scrap wood.

Yes, these screws are suitable for plasterboard (drywall) installation, but ensure you select the correct length for your stud thickness.

Yes, but use caution and start with a lower torque setting to avoid stripping the screw head or over-driving the screw.

Generally, space screws about 150-200mm apart along the studs and around the perimeter of the plasterboard sheets.

If a screw is too short, it may not adequately secure the materials. Remove it and replace it with a screw of the appropriate length.

Information about the warranty is not available in the provided product data. Consult the manufacturer or retailer for warranty details.

Use the correct size and type of screwdriver bit. Reduce the torque on the drill. If the screw is already stripped, try a larger screw or fill the hole and re-drill.

Ensure the countersink bit is the correct size. Apply even pressure during installation. If the screw is too long, it may bottom out before countersinking.

Pre-drill pilot holes in hardwood. Reduce the torque on the drill. Use a higher-quality screw if necessary.