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Use the 470
I had earlier had a chance to pick up some AN470 AD3 rivets in a few different lengths, this was a perfect spot for a couple of them, one each flap. Don't remember if I cut off the -4's or not. Works beautifully, looks great, the head is still well below the surface of the doubler, no material removed from the rib, all good.
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For 0.032 or thicker sheet, I use NAS1097's to rivet nutplates on. For anything thinner, I just dimple the sheet metal as well as the nutplates, even going so far as to use Cleaveland Tools' SubStructure dies on the nutplates.
I recall reading that dimpling is more secure than machine countersinking since the metal parts can't slide in relation to each other as well. |
I dimpled this hole and drove in a flush head rivet per the plans. Everything lines up nicely.
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