30mm profile insertion nut for M4 screw

For attaching accessories to a 30mm profile, without having to disassemble the printer. Uses M4 screw + nut as the biggest that can pass through the profile hole.

Small details - slicing to 0.4mm layer failed, 0.25mm worked.

M4 nut was fit into the prepared hole with the help of soldering iron.

Usage: insert the whole assembly into the profile, rotate the nut clockwise, tighten the screw.