Hi Ansmy,
Unfortunately Screwfix is unable to offer installation or usage advice other than that contained in the manufacturer’s instructions. Neither are we allowed to recommend specific products. If you are not sure, we would also recommend contacting a suitably qualified tradesperson for advice.
Fixings to consider could be M3.5 (3.5mm) and/or M4 (4mm) countersunk screws of the appropriate length.
Thank you for using Q&A. PM
Answered by: Pebo
Date published: 2020-01-17