As I said earlier the bolt at the center pylon hinge is shown to be a AN4-11A and I suspected the outer bolts would also be the same and you have proven that out.T. C. Downey wrote:Those bolts are not shown. but measure out to be AN4-11A for the elevator, and AN4-12A for the rudder.
I also said that the two top rudder bolts in the A model IPC (same as the 170 and B model in this area) are shown to be AN4-11A. Yours measured -12 which would probably work with washers.
So we have identified all the bolts you asked but one and that in the bottom rudder bolt that goes through the rubber horn control hinge. I know this one is longer than the top two.