Beige screw with round head and galvanised iron thread.
Wood joint with galvanised iron thread.

Use
Assembly the shelving, starting from the top.
To close the top part, tighten the terminal screw to the “female” of the upright, used the opposite way around.
To close the bottom part, screw the joint to the “male” of the upright.

Advantages of Kompo Quadro