Ever since I dove into the electrical side of things with my project, I've encountered a bunch of code restrictions. One thing that wouldn't surprise me if it was a violation of code is what I've done here:
I did this because I have to install five of these things and don't want to disturb my neighbors. To get the screw to fit without breaking the tabs, I drilled through them with a 3/16" bit. The screw goes through with just enough snugness to hold on to the plastic with the threads, but not too snug that it bends or breaks the tabs. I did a test install on a stud and it holds really tight.
I did this because I couldn't find any screw-in receptacles at the hardware store that would allow me to bring the face of the box out 1 1/4" inches from the stud so that it would be flush against a double layer of 5/8" drywall.
Update: Crap. This is not going to work. I need to bring it out too far from the stud. When I go to install the drywall, the drywall is going to run into the mounting assembly. I need a box with the assembly in the back. I won't delete this question, though, in case it will help someone else who is not trying to add one million layers of drywall.
Best Answer
Here's another type of adjustable box that you can use. Just mount the box approximately where you want it and after you find the correct depth you can move it, even after drywall has been installed.
Here's the cut sheet on it. Here.