Questions: self drilling/ tapping screws for chassis work

ktmrfs wrote:
hex head self tapping screws with cordless drill. No need to drill pilot holes. I've installed literally hundreds in steel and aluminum and never have snapped one. I don't even bother to set the torque slip on the drill. you know exactly once it penetrates and then I back off the speed.

I prefer the hex heads rather than a torx or robertson head. lots more material in the head and a 6 point hex head driver works well.