Just had a closer look at the XinTD SC-82 pill, version 3.
The threads are not populated in stock form, but could certainly be used in an emergency. A dire need for a 20mm noctigon XM-L2 comes to mind…
Threads are M2, metric standard pitch, I tested it with the longer screw shown in the picture.
Version 4 might have threads as well, a picture of Foy’s review of v4 at least shows similar holes.
Greetings