RS2205 CW Silver Motor/Prop Nuts for CCW motors
This Motor/Prop nut is designed for RS2205 motors that spin counter clockwise and contain a clockwise thread. As the motor spin counter clockwise, the nut will tighten down the propeller. This nut is specifically for M5 screws threads, so any motor you have that shares the same thread will work as long as the thread is clockwise.
Recommended to use a #8 ratchet wrench to screw the nut down, the nut also contains a washer at the top of the thread to be bitten down on the thread of the bolt from the motor shaft and prevent slippage or loosening from vibration.