I didn't quote any section Ryan, I just used what I call a fair approach because you are right there isn't any precise wording that says "You must use a green screw for connecting the equipment grounding conductor to the outlet box" Let's use the materials made for the job. When you buy an outlet box with a ground screw in it - it's green. When you buy a box of ground screws from the supply house- their green. A person wouldn't go to the supply store and buy a box of 10/32 galvanized screws with the intent of using them for ground screws. I have yet to see a product made in the US that has a grounding terminal or a ground screw that wasn't green. GROUND SCREWS ARE GREEN. Would you use a green screw to terminate an ungrounded conductor? No. Green screws are for equipment grounding conductors.
