Not threads. The 1/2" copper pipe I have, which I used to make the dip tube for my kettle, won't fit into the compression fitting. I suppose it's because rigid copper "pipe" has a different wall thickness than copper "tube". I didn't think about that when I first cooked this idea up.
Going to Lowes tomorrow to see what parts I can grab to make this work.
Though, if worse comes to worse, I can always make a copper pipe manifold for the bottom and abandon the $20 I paid for the splatter guard. In any case, it shouldn't affect your false bottom because you could always get the proper copper tubing (soft copper tubing, if I recall) and use the compression fitting (may sell you mine if I can't use it). I already made the hole in my FB, which would be too big for the smaller OD soft copper tubing, but I think you could make it work.
Will know more tomorrow, I hope.