What are the specifications of the bolt used to secure VKB stick to the base?

[youtcham]

Could someone share what are the exact specifications of the bolt securing the stick to the base?

This securing solution is giving me a lot of troubles and seems to hate the vibrations coming from motion platform and Rhino base.

Now the hexagonal head of the bolt has worn off, since I have to resecure it quite often, and I need to change it.

Many thanks in advance,
y.

[Delta]

DIN 912 M3×16 should be a good fit. Probably not the exact same head (VKB use a knurled head that is common in China), but metric screw threads are highly standardized things.