Unifix Drywall Screws - 3.5 x 50mm - Black

You will typically need a Phillips #2 driver bit. A magnetic bit holder can also help prevent dropping screws.

These screws have a black phosphate finish for corrosion resistance, but they are primarily designed for interior drywall applications. For exterior use, consider screws specifically rated for outdoor environments.

The bugle head is designed to countersink smoothly into drywall without tearing the paper face. This creates a clean surface for applying joint compound and paint.

Yes, they are suitable for metal studs. For thicker gauge metal studs, you might consider pre-drilling a pilot hole to ensure easier driving and prevent thread damage.

This pack contains 1000 Unifix Drywall Screws.

CE marking indicates that the product complies with the health, safety, and environmental protection standards for products sold within the European Economic Area (EEA).

Coarse threads have wider spacing and are designed for better grip in softer materials like wood studs. Fine threads have closer spacing and are typically used for attaching drywall to metal studs.

Ensure you are using the correct size and type of driver bit (typically a Phillips #2). Apply firm, consistent pressure directly in line with the screw. Consider using a screw gun with a depth-setting nosepiece.

Verify you are driving the screw into a solid stud (wood or metal). If driving into metal studs, ensure the metal is not too thick for the screw length or consider pre-drilling a pilot hole. Check that the thread is engaging properly with the material.

The clutch on your screw gun may be set too high. Adjust the depth setting to allow the bugle head to sink just below the surface without puncturing the paper. Apply less pressure if using a standard drill.

Ensure screws are stored in a dry, climate-controlled environment. If minor surface rust appears, it may not affect performance, but significant rust indicates improper storage and potential compromise of the protective finish.