Add some screws but I think the cuts don't look realistic, I want to make the ends of the screw cuts a bit more "flat" but no idea how to do it as of now, hopefully by the end of the course I will be able to
Redid the screws using boolean with a bit of bevel to make it look more realistic, I am happy with it now :)
Awesome job with the crate.
I agree with Spikey about the screws, smaller screws and perhaps one in the corners of each of the faces where you have one large screw.
Additionally, smaller screws will make the artefacts from the Boolean less visible.
Keep it going, on to the next project.