This portrait is made of threads, or with other words, it is freestitch embroidery sewn on water soluble fabric, who therefore disappears in water and leaves you with only the threads. This piece Is sold as print and artcard. Read more this and watch a work video I made - all on my website. Hope you like it MAD ;-)
My problem was a lack of understanding about how a screw joint actually works. It's not the threads biting into both pieces that secured everything in place. Rather, the strength of a screw joint comes from the threads pulling the screw through the bottom piece and securing the top from the pressure against the screw's head. The threads are irrelevant in the top piece; only the head matters.