If I have a box with no 10-32 tapped holes (for ground wires) and if I don't trust the little green clips because they fall off if I even bump them, do I have any good alternatives?
The NEC apparently says the ground screw must have three threads in contact with the box, or use the clips. Even if did drill/tap the box, I don't think I'd hit three threads because the walls are so thin (I think the boxes manufactured with the 10-32 screw holes are pierced which thickens the material in that location).
I'd sort of like to just drill the box and use a nut from the other side of the ground screw (I have access). But that three threads in contact with the box is a problem because the three threads would be in contact with the nut, not the box. And I think an inspector would point at the nut and ask "what the heck is that?"
I checked the boxes at HD and Ace and their octagonal ceiling boxes also have no threaded holes for ground wires.