Ultra-lightweight M5 aluminum alloy lock nut for securing your gun to the robot’s motor. It is compatible with all motors with a 5mm threaded shaft (typically brushless motors sized 1800–2400). The nylon insert in the nut prevents accidental loosening, for example due to vibration, and thus slippage of the weapon. We sell the nut in two versions – with clockwise and counterclockwise threads. It is important to choose the correct direction of rotation according to your motor, otherwise the nut will not fit.