Need tub drain adaptor/bushing

Please help! I,m going blind trying to find an odd-sized tub drain adaptor on the internet.

The tub is a 55-year-old Kohler. The drain itself is 2-3/32" OD (or possibly 2-1/8"...I found an adaptor that would fit a Kohler of that OD, but the TPI was wrong). The TPI of my drain is 14 ( I read that 14 TPI is unusual, but does exist).

The ID of the adaptor needs to fit any of the common drains available today.

Thanks for any help anyone can give.

what is 2 3/8'' what is a tpi ?

do you need a trap adapter?

frodo said:

what is 2 3/8'' what is a tpi ?

do you need a trap adapter?

Click to expand...

Are you

Threads Per Inch

He needs the flange that screws into the shoe of a tub waste.

There was a similar post awhile back asking about the same thing.
Maybe I can find it.

Found it

Don't think it solved his problem.
Link to thread on tub drain

I did find this in a old Partsmaster 1999 catalog

Might help

2-3/8 seems kind of big.

tub drains are closer to 1-1/2" size on the threaded part