It's metal to metal. And is adjustable. Just "mess" with it, moving it in
and out a little. Access to the nut requires removal of the rubber cover.
You may also need to look at adjusting your door closure, which may be
allowing the door to move even though it closes and stays closed. That's
just a large phillips and again, you can experiment with it. Adjusting the
door closure latch is probably more likely the device needing adjusting if
you can jiggle the door while closed.
Bob

Happy is he who bears a god within.
-- Louis Pasteur
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