Thread pitch on cladding wheelwell screws?

[VX KAT]

Hi Sue,
I don't know the pitch, but here's my thread on stainless screws. I bought them from Fastenal as well. Part number is listed too. Seems to be same pitch. See pics...
http://vehicross.info/forums/showthr...nless+cladding

I'd forgotten about that thread, nice! But these are flange bolts, they're the two at the bottom and rear of each wheel well arch. Looks like those have a very course thread too, like the ones I'm after, but I'd need a bigger head ...(ok, no comments boys!) I recall the Fastenal person saying he could tell these were definitely automotive bolts because of the very course thread.
I'm going to stop by Fastenal with your part #and see if it leads us to an alternative. Thanks.