APPLICATION:
Universal joint coupling adopts a special coupler, used for connecting the motor shaft and the hexagon wheel of the robot, and other DIY models.

ADVANTAGES:
1. The universal joint coupling nuts are nickel-coated iron, which is sturdy and durable for long-lasting use.
2. The universal joint coupling provides torque transmission and alignment, a cost-effective coupling design, which is very flexible and easy to use.
3. The rotatable coupling is perfectly applicable for RC model cars and the RC model boat is the perfect motor shaft fitting accessory.

PACKAGE CONTENT:
Thread Size: M3
Inner Diameter: 2mm to 2mm
Length: 18mm/0.71 inch
Outer Diameter: 8mm/0.31 inch
Color: Silver Tone
3 Pack of Universal Joint Coupling Nuts ( Included 1 Pack M4 Hex Wrench, 6 Pack of Fastening Screws)

NOTE:
For manual measurement, please allow a slight dimensional error of the item.