Minute hand bushings that fit the style cuckoo hands that have a round hole in the minute hand. These are sold in a six pack of the same size or a single bushing can be purchased.
The hands are installed in this order: Hour hand goes on first as a friction fit, it just slides on the hour tube.
Then comes one of these bushings on the square minute hand shaft.
Then comes the minute hand with the round hole and the hand nut to pinch the minute hand against the bushing.