I can't be of any help with the question but I too would like to know the original construction of the deck/trunk hinges. Mine are held together with socket head machine screws and nuts. To make matters worse, one of the hinges is hand made of stainless steel and although someone did a pretty good job of shaping them, there are holes drilled clear through to fasten with counter sunk hardware. Not very classy! On the plus side, one pair of hinges is stock and in pretty good shape. Steve