One of those pics (bottom left) is from San Diego, when you could still DRIVE on the beach! Stinkin doo-gooders...well, having said that, there IS one beach left where you can. Fiesta Island. You should see the looks of the above referenced ilk when they see you driving...Shock, disgust, and in your face! till you say calmly, 'hey, it's legal to drive on the beach here'...
I'm not well versed on 'all things correct', so assume these are factory rounds. There is no other bolt pattern on the door.
In fact, when trying to remove, one of the factory threaded plugs started turning in the door skin. Good thing I had planned to restored the door soft parts and had access to tighten.