Flexplate to crankshaft bolt is N 90539801 screw, cheese head M10X1X19X11 Unusually cheap too:
https://www.audiusaparts.com/oem-parts/audi-screw-n90539801
Type: Posts; User: hahnmgh63
Flexplate to crankshaft bolt is N 90539801 screw, cheese head M10X1X19X11 Unusually cheap too:
https://www.audiusaparts.com/oem-parts/audi-screw-n90539801
If I remember right that is correct. There are two bolts per flange (3 flanges) on the Torque Converter.
Bolt - Audi (01L-301-127)