I am having some custom turn signal fork clamps made for my 52mm HD inverted front end, since none exist. The question has come up as to what the thread size and pitch is on the front turn signals. Bike is a 07 FXST with the bullet style stock turnsignals. I appreciate the help.

 

is it 5/16"-18 or 5/16"-24

 

5/16-24.

 

Thank you.