Side Pipe screw bolt question

[Ronald L.]

For the mid years, 66 specifically, and even more precise, big blocks, what is the correct original screw that was installed at St Louis to attach the bracket inside the wheel opening to the fender skirt???

I saw a philips head on a 18K car that I was told was correct.

However...
For many years I've expected to see a hex head self taper that has a F or squiggly quotation lines on it.

[John H.]

Re: Side Pipe screw bolt question

For the mid years, 66 specifically, and even more precise, big blocks, what is the correct original screw that was installed at St Louis to attach the bracket inside the wheel opening to the fender skirt???

I saw a philips head on a 18K car that I was told was correct.

However...
For many years I've expected to see a hex head self taper that has a F or squiggly quotation lines on it.

Ron -

It was GM #9421033, hex head - it wasn't used anywhere else on the car.