No way Jose, Any aluminum bolt is not a good idea for the seats and or brackets as stated.
I went with high grade Titanium on mine. Saved only a pound or so if I remember correctly and that was between both front A-100 seats and the bolts attaching the seats to the brackets. Lot more costly then aluminum, but also a lot more safer in a Amen situation. In any case, make sure to use good grade Titanium or 7075 aluminum wide washers under the seat to chassis mount to spread the clamping.