Joe,
What is the definition of a "sheet maetal screw" and where do we find it. I know that the intent is to provide a secure electrical connection, but when you look in a hardware catalog you will find that the ones in your pictures are not shown as "sheet metal screws". Look at: http://www.mcmaster.com/param/asp/psearch.asp?FAM=selfdrill&desc=Self%2DDrilling+Screws
Here are "sheet metal screws": http://www.mcmaster.com/param/asp/psearch.asp?FAM=selfdrill&desc=Self%2DDrilling+Screws
I would not like to see either one of the above used to terminate an EGC, but if I was an inspector, I would have no grounds to turn down the self drilling screws. The code needs to be changed to require the use of a machine screw or a machine bolt to make the section clear and enforceable.
Don(resqcapt19)
