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

Product Details

Is the Spax Scr Ful Csk TS20 suitable for general timber and construction boards?

Yes. This screw is designed for reliable fixing in common building applications where a countersunk head is needed for a flush finish. The fully threaded design helps provide strong grip along the full length.

Will the head sit flush when I drill and countersink?

It is intended to. The countersunk head is made to sit flush in properly prepared material. Pair it with the correct countersinking and pilot hole where required to achieve a neat, professional result.

What size drill bit and pilot hole should I use with a 3.5 mm thread screw?

Use the manufacturer guidance for the material you are fixing into. As a rule of thumb, pilot hole sizing should suit the timber or board thickness and density to reduce splitting and improve performance. If you are unsure, check the screw or fixings instructions for your substrate.

Which drive bit do I need to install these screws?

You will need a T-Star or Torx drive. Using the correct bit improves control, reduces cam out, and helps you drive the screw to the correct depth consistently.

Are these screws corrosion resistant for exterior or damp use?

They are zinc plated and include a galvanized style finish, which offers improved corrosion resistance for many construction environments. For fully exposed outdoor applications, it is still important to follow project requirements and any relevant specifications for exposure level.

What does the 4CUT tip do and why is it helpful?

The 4CUT tip with a patented wave profile and multi head is designed to aid cutting action during driving. This can help the screw start cleanly and bite effectively, which is particularly useful when working quickly or with larger batches.

How many screws do I get in a pack, and what length is this one?

This product is a 200 pack of screws with a 35 mm length and a 3.5 mm thread diameter. Buying in bulk like this is convenient for larger jobs and helps keep your fixings consistent throughout.

Are these building regulation approved?

Yes. They are listed as Building regulations approved Z 9.1 235. If your project requires approved fixings, this can help you choose the right option with confidence.

If you are planning a timber fix task and want a consistent, countersunk finish with the right drive type, this Spax Scr Ful Csk TS20 D3.5x35mm Wrx 200 pack is a practical choice. Consider ordering the 018.50.093 pack so you have the correct length and thread size ready for site.