I removed an old tub drain fitting to replace it with a Lift and Turn drain with stopper. The old drain fitting has a fine thread 1.75 inch OD. I have a hard time finding a replacement in stores. What is the thread I need and what to buy where?

Thanks

They make one that comes with a bushing so you could go one way or the other. Watco 38196 I believe

Agree with post above. Go to Home Depot and get new drain flange that comes with plastic bushing. Look into the package before you buy it to make sure it is there. Also, don't forget to buy flange removal / installation tool. It makes installation very easy and assures proper fit

Hope that helps

Milo