Drivers door rubbing.

[Fengad]

Hello all, bit of a long shot. I have noticed the hinged on the drivers door has worn and is causing the door to drop. Rhe door rubs on the wing panel when I open it, which is now starting to rust as it's has scraped off the paint.

Does anyone happen to know what size the bolt is for the hinge linkage? The one below item 18 (cap)?