Motor coupler 4-3 set Used to connect 3 mm and 4 mm diameter shafts or axles. It is a great solution to connect the shaft of the Nema 8 motor with the 3 mm Lead screw.
Can be also used to connect Lead screw with other motors with 4 mm diameter shafts.Used to extend metal rods. Comes with Tapper set bolts (4pcs.) and Hex Key.