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Guys I need some help here. I used to know these things but since I've had my brain injury I sometimes don't trust myself.
I want to mount a short pedestal to an aluminum bench seat that has flotation under it. My first thought was to use fat sheet metal screws. Now Im afaid that it won't hold stong enough. What do you think? The bottom plate in the photo will be removed.
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If it was me I would use stainless bolts and nuts if there is room. JMHO
Why not a track for the seat you have ? Most all boat dealers sell them .
Regarding bolts:
Thats what I thought too. The flotation is in the way underneath. May I should drill a channel in the flotation to get the bolt in?
Regarding a track:
That is what I am replacing. The bottom plate in the photo is part of the slide mount.
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I have used well nuts for things like that. They're cheap and easy.
Toggle bolts will hold for sure.. it will leave large holes though if ever removed
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Being on the front, how about a small platform also.. you could fasten down with screws then bolt seat to that. It could be cut to be flush with the gunnel whatever length you want.
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Having done all of the above I would suggest starting with screws. If they pull out, then go the other routes. My 16-36 which looks very similar to your set up I built a slatted platform that goes back to the second brace can lift in and out used a plate with king pin mount, makes it nice to stand, been in service for 20 yrs. bass pro has a 3 piece set for about $60 free shipping will need a 2 1/2" hole saw. In my 2052 using same plates attached for 2 years now with #14 1" Screws. I do recommend the threaded base and pole, much more stable. I have in the past pulled rivets, bent metal and used ss bolts and washers and locking nuts, boy a pain, so would go with toggle bolts, 0nly problem is could not find in stainless so rust is an issue. best of luck
Bass Pro Shops 3-Piece Pedestal Set | Bass Pro Shops
I would recommend riv nuts, they will certainly hold and are relatively permanent.
I will second the riv nuts. I use them for any blind hole application.
Ok guys riv nuts it is. Never used them but they look perfect for my needs. Ordered some aluminum style last night.
Thanks to all for the suggestions[emoji846]
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Not familiar with that style fastener but I did do a Google search just to see what they look like. Depending on the material that you're going to be putting them through it may be beneficial to at least put a fender washer on it.. may help to prevent them from possibly pulling through
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I mounted my swivel to a 18' by 12" 1/2" piece of plywood. Then I used construction adhesive to glue it to the bench top. It was solid and even my 225# butt did not move it.