I don’t know if there is some CAD friendly fastener numbering system out there , but I haven’t seen it
IMO - Fastener’s need meaningful codes but how to manage that?
So here is my solution - I’m sure it can be improved but it actually works fine for my purposes.
Same process can be applied to all sorts of parts.
So here is sneaky link.
Download and change the extension to xlsx
Fastener_Part_Numbering_System.x_t (14.9 KB)