Door hinge interchange? Darts, mainly

CFD244 said

IIRC, the holes are the same. The pin is held in the outer part with knurling right below the head. It is pressed into the outer 1/2 of the shell. Maybe @Oldmanmopar can confirm this.

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Thanks for that. I also wonder how much real world difference it would make to mount one upside down; that is, if there's any real danger of the pin working itself loose? Not that I intend to do so, just curious. I realize that from an engineering perspective, they designed them a certain way to avoid ALL chance of them falling out, but if there's any actual danger of it happening.