mungedaddress wrote in
:

Sounds like a bad idea. Rust comes to mind. You might have to get
stainless steel screws if you really must use screws.

I would be concerned about rust, and with "decking type" screws
I'd be concerned about what they're plated with (which most
likely should not be anywhere near food).

If alignment is the issue, I'd use wood dowels.

John