Passing binary data as arguments in bash

I need to pass binary data to a bash program that accepts command line arguments. Is there a way to do this?

It's a program that accepts one argument:

script arg1

But instead of the string arg1, I'd like to pass some bytes that aren't good ASCII characters - in particular, the bytes 0x02, 0xc5 and 0xd8.

How do I do this?