This thread and a few others have bounced around and seemingly jumbled a few different points. For what it's worth I agree that a Green Grounding screw with its wider head seems more suitable for attaching a wire to the box than a smaller-headed clamp screw.
With that aside, Re: 250.8:
I have a question... If 250.8 means to say only specific listed 'grounding Screws' must be used why does it bother to say "Sheet metal screws shall not be used to connect grounding conductors to enclosures" ??
Bill
