Hi everyone. I am in the process of skinning the underside of my 2014 21'SLX. I have 0.063" 5052 aluminum for the material and was wondering if a 410 stainless self drilling screw (#12 - 1-1/2" length) would suffice or if I need to get 316 stainless (or something else). Any suggestions are appreciated. The boat is used in salt water. Thanks!