Shower End part

Highly specific shower end part that looked like metal but was thin plastic and cracked.

I've printed in PLA @ 30% infill to test fitment but probably need to do 100% ABS for the strength and temperature resistance. The pocket for the seal right above the threads is a bit tight (I.D.) but does fit.

I don't know how to do threads in Blender, I resized this design:
https://www.thingiverse.com/thing:2409982