I had to drill out bunch of rivets on alum boat as there was cracks on the edges, putting back butter 3m5200 patches over and replacing rivets with machine screws because holes are bigger than 1/4 rivets. I can't find aluminium rivets, i hope the stainless machine screws won't rust out the boat ! anyways.. where is a cheaper place to order these to canada, i am getting some very expensive rates, need the screws, washers, lock nuts. thanks everyone.