40731 | https://www.smta.org/icehet/ICEHET-2020-Program.pdf
Surface Mount Technology Association (SMTA)
PCB Libraries, Inc. | https://www.pcblibraries.com/forum/RSS_pcb-design-basics_forum8.xml
0.15 mm (6 mils). The big issue is the pad annular ring. The fab shop will add 3 - 4 mils to the finished hole size. Then you must consider drill drift and layer to layer tolerance of 3 mil