I am about to have the builders fix some brackets to a 10mm square steel post.
They are proposing to drill all the way through and have nut and bolt.
Fine for the intermediate posts but it might be neater for the end posts to drill and tap and then just use a bolt.
So how straightforward is it to drill and tap a hole for say an M8 bolt?
Something to buy, something to hire, or something to avoid?
Cheers
Dave R