S60 is the steel extension for a .600" butt diameter shaft. S56 would be the code for the .560" steel extension. 19/32" is .5938" and it would like still use the S60 extension. The S58 (.580") extension would likely fit to loose. Is this rust on the inside or outside of the shaft? Shafts were not chrome plated all the way to the butt end of the shaft until the early 90's. If the rust is on the outside of the shaft and would be covered by the grip you can sand it away. If it is on the inside of the shaft it could be an issue especially there is quite a bit of rust. At some point a new set of shafts might be a safer option.
Date published: 2016-10-17