Rivets would be my choice for that application.
I am adding the attached rub rail on my pondtoon. It is not pre-drilled, so I will drill/countersink the rub rail. They (Taco Marine) recommend holes 6 inches apart and secured to boat using a 1 inch #6 screw to secure the rub rail.
Here is the rub rail link.
https://shop.hamiltonmarine.com/prod...-1--44395.html
Here is my concern(s)
The aluminum is .100 inches thick.
Those stainless countersunk screws are mighty small and I am not sure if they will break off when I try to screw them into the hull. Of course I will pre-drill the hull, but I have broken managed to break stainless screws, even when pre-drilled. so, what's the trick to get the screws thru the hull without breaking them?????
The rub rail will be placed on top of the existing aluminum rail.
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Rivets would be my choice for that application.
Eric
yep, rivets.
You may want to drill holes. Then use a tap first to help make the threads. Then the screws with silicone or some type sealant on the screws. That will water proof the screws and help keep them from backing out.
Be safe and good luck fishing
Are rivets an option?
If not, do as scrat said. Or use a screw of a material that will not break near as easy, which will, in effect, tap it.
Drinkin coffee, missin fish.
Here is what you do CP, find you the exact same size screw in a self taping screw. Use it to make your initial hole then back out and install stainless screw.
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I have bought stainless self tapping screws at Lowes and Menards. They worked great on my sons aluminum boat.
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There will be days when the fishing is better than one's most optimistic forecast, others when it is far worse. Either is a gain over just staying home.
Why not just hang some "bumpers" .... off the sides of the dock slip ??