Odds are that with enough talent you can modify any hub to solid axle, some more easily than others.
The question you have to ask yourself is - why, what benefit are you hoping to realize? In the case of the hub you have pictured, a conversion to solid axle would probably toward the harder end of the spectrum, possibly needing some special parts custom fabricated. Odds are that whatever benefit you're looking for could be achieved other ways for less effort or cost.
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