I tried stainless steel hex head screws and wasn't impressed. They easily cross the thread if I'm not careful and I've plucked a few of them. I also needed something compatible with copper, not stainless steel. They seem to have much better threads and it's 10.9 so it's a little stronger than stainless steel. Also, I'm much better at tracking sockets than allen wrenches. The flange head is great. Update: In my endless attempts to stop the rattling at loud music, I've used a few of these screws on my car to replace plastic clips on bumper covers, for example, and they rust immediately once they're back out. It wasn't raining or anything, but it was a bit humid, so they got wet and rusty right away. Otherwise there are good bolts, although after my rust experience I'm not sure I trust the 10.9 designation. The post says they are corrosion resistant, which I think means they wouldn't rust, but I was wrong.
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