Yahata Neji, M4 Iron Thumb Screw, 12mm

The Yahata Neji plastic screw is a metal screw integrally molded into the resin head and it has trivalent chromate plating. It is used for tightening parts where you want to repeatedly remove screws by hand without using tools.

Non-slip serrations on the outer circumference of the head It's attached
Resin part made from resin