That is an impossible question to answer.
The fitting is called a drain shoe.
The threads primarily hold the top drain tightly in place.
The plumber's putty and the washer below do most of the work.
But, under high head of a full tub, you won't know without functional observational testing.
I wouldn't professionally ever use that shoe again.
Me either, It looks like you got pretty deep into those threads. Is it open basement below. If so then put
it together and try it. If its above a ceiling then replace it. As a homeowner you can try it but as a professional
plumber working in your house we would have to replace it.