No, a hinge pin is just a barbed two piece point. The flat hinges look a bit like a CA hinge cut in half with a brass pin holding them together. They come in several sizes. I just used the last of the small ones I had on hand for a water rudder on some floats and the rudder was only 1/8 thick. I have used them on rudder on my 3-D arf, it is only 1/8 thick sq. They hold great with just epoxy.