84-074N but without the center aluminum cylinder.
A handy person from Mt. Washington, KY says:
April 26, 2015
Just like 84-074N but without the center cylinder that houses the head of the screw. The cylinder appears to be made from aluminum. This is from a 2015 Airstream Interstate.
Paul from SWISCO responded:
April 27, 2015
I agree, our 84-074N appears to be our best match. The top cylinder you mention can actually be removed, so you don't have to use it if you don't need it.