fasteners for seats

[Olustee bus]

My deck is aluminum. I have new seats to install. It had self-tapping screws. What fasteners are best

stainless nuts and bolts. ( sometimees can be difficult due to aluminum floor design.)

Self tapping screws stainless or regular steel
an

anyone have suggestions for helpful hints or videos?

Thanks

[Lilguy]

are you replacing or adding? If replacing what’s there now. Ive always used stainless on boats. That’s just me but its obvious why. Through bolts are usually a stronger hold if doable.

[curtiscapk]

yep SS tappers!