I'm trying to help a friend with his 1969 convertible. He has a broken screw/bolt at the pivot near what would be a roof rail on a coupe. I can't find any drawings for the top in the parts books I have. I came up with a possible part number of 4412920 but it's hex. All the hardware on his car, & 3 other I looks at, were large slotted...kind of like a licence plate screw. Can anybody help me with a part number for the correct screw/bolt? I usually don't have this much problem with parts. Thank you, Joe