Spax® Screw, Countersunk Head with TS Slot, Fully Threaded

Is this SPAX screw suitable for fixing into timber or similar substrates?

Yes. The SPAX Scr Ful Csk TS20 uses a specialist 4CUT tip designed to improve bite and reduce splitting risk in typical woodworking applications. It is well suited to general fixing tasks where a reliable countersunk screw is needed.

Will the countersunk head sit flush after fitting?

Yes. This model features a countersunk head so it is intended to sit flush with the surface when installed to the correct depth, helping achieve a neat finish for furniture, frames and joinery type work.

What drive size do I need to install these screws?

You will need a T Star or Torx compatible bit. These screws are supplied for use with the TS20 drive system, which helps prevent cam out and allows consistent torque while driving.

What does the 5.0 mm thread size mean for my project?

The thread diameter is 5.0 mm. That measurement helps you match the screw to the hole size and material requirements. If you are pre drilling, you will usually want to follow the guidance for the specific timber and fixing method you are using.

How do the length and pack size work?

These screws are 50 mm long and come as a 200 pack. The length is commonly used where you need solid penetration without overrun. A 200 quantity is convenient for jobs where you want consistent matching screws without frequent restocking.

Are they protected against corrosion for normal outdoor or damp area use?

They are galvanised and zinc plated. This provides corrosion resistance for many typical construction and maintenance applications. For harsh coastal environments, fully exposed long term weathering, or where you need specific durability standards, it is best to follow your project requirements and applicable guidance.

Do these screws have an approval for building work?

Yes. They are described as building regulations approved to Z 9.1 235. This can help if you need a documented compliant product for the type of work you are completing.