3593 thread 20x1.5mm
gasket od 2.475 id 2.173 th 0.233

3506 thread 13/16-16
gasket od 2.734 id 2.430 th 0.226

Those two filters aren't really interchangeable. The threads are close but not exact and the gaskets are way off. If it were me I would put the correct size on ASAP.