Oil Filter Adapter
From the measurements I took this morning, I don't see how the center can bottom out unless the gaskets are extremely thick and rigid. There is 0.089" more clearance between the center gasket faces than the outer gasket faces.
I stated earlier that my center bolt was not stretched or broken, but that is incorrect. It is not broken, but I can feel a small diameter change between the four holes. I think it is stretched. But it was still (fairly) tight when I broke it loose.