Depending on the age of the clock the hands of a grandfather clock are held on by a tapered pin or a hand nut. The older ones use a tapered pin. If the shaft you put your minute hand on has a small hole in it then you need a pin. If it is threaded on the end then you need a hand nut. Either one can be obtained at your local clock shop. You may have to purchase several to find the right size.
If it needs a pin also get a washer for it.
Stevens Clocks, September 2009
