This propeller mount can be positioned anywhere along the shaft and the b103 keyless bushing, purchase separately, grips onto the shaft with surprising force. Typically they can transmit over 600 foot pounds. Available in two sizes. The six holes are threaded for 8-1.25mm fasteners on a 75mm pattern standard for ultralight props.
Fits Ivo prop, Powerfin and Competion aircraft ultraprop