Hi Anas and welcome to the forum.
The Steel designers manual recommends making 2 mm larger than the named diameter of the bolt, so in your case, the hole would be 10 mm. This changes to 3 mm if bolting through more than 2 plies.
The tolerance table start at M12 unfortunately but you get the general jist. This is listed on page 1236 under 'Bolt Data'. Thats the closest I can get to getting you something in writing I'm afraid but I hope it helps.