coupling finger nut

thingiverse

I planned to utilize the Elproducts PTFE coupler but found that my Ender 3's part cooling plenum did not provide sufficient clearance for the nut. To address this issue, I employed Tinkercad to modify the nut, enabling it to fit within the available space. The nut was lengthened vertically to allow finger tightening, and a gear shape provided the necessary serrations for a secure grip. Additionally, the interior volume was reshaped to accommodate the unique shape of the coupling.