quote Garry in Tampa:
YES – The pin is a single piece. It is the same material as the shaft so when sheared, it is very hard to spot. Worse, when sheared it may distort the hole making it hard to drive out. Best use a brass shear pin when you get it properly back together. . . 😆
Just so there is no misunderstanding, Garry means the brass shear pin in the prop. The pin in the gear is not supposed to shear, being harder material than the prop pin.