Different TT construction
It seems that the industry is slowly moving away from wood stud, fiberglass insulation and aluminum siding to the fiberglass skin, aluminum tubing, solid foam for wall construction. Both have their p...
Forum Discussion
Durb wrote:
I replaced most of the screws (over 600) on my trailer with stainless steel and they were only $3.50 per box of 100. A dab of silicone under each screw head. I think the manufacturers use hardened self drilling TEK screws to speed up installation. These are plated and start to corrode immediately when wet and in contact with aluminum. I don't know if stainless would work well as a self drilling screw.
I have gone to the stainless too. I did get some self drillers where I needed that feature. They work well through aluminum and steel sheet metal.
These. https://www.albanycountyfasteners.com/Self-Drilling-Screws-s/1618.htm
They are made from 410 stainless which is harder than 304 stainless that I use all over where non self drilling is needed.
And yes, the original steel ones are hardened. They are hard as heck to cut off, or even drill out. They will chip off a cobalt bit even in short order. But they do grind off if the area allows it. Once the head rusts out, that nub can be a bear to get out.
