Stereo & Electronics - Bazooka sub install screws needed?

I don't have any screws to put the subs in what screws from the auto parts store or hardware store do you suggest.

get some self tapping screws if you have a drill

And make sure where you are tapping these screws into there is nothing on the other side... That would be a headach.

What about m4x20 socket head screw?

I used #6 speednuts from autozone and #8 screws from home depot, so i didnt have to drill anything, was pretty easy, I used tape to hold the speed nuts in place.

I used #6 speednuts from autozone and #8 screws from home depot, so i didnt have to drill anything, was pretty easy, I used tape to hold the speed nuts in place.

What head on the screw? Socket or phillips?

I used the its and the metal piece that the factory screws screwed in to. I just used longer screws that were the same thread pitch. Worked out great and it didn't take any time to do. I can't remember the size of the screws but I can check this weekend. I still have a couple extra in the package