Socket head metric machine screws. You'll probably struggle to get that exact style, but even Screwfix do button head ones which do as well (granted they are stainless steel, but they illustrate the sort of thing I'm referring to)
If you need to find a tradesperson to get your job done, please try our local search below,
or if you are doing it yourself you can find suppliers local to you.
Select the supplier or trade you require, enter your location to begin your search.
Please select a service and enter a location to continue...
Are you a trade or supplier? You can create your listing free at DIYnot Local