Generator pulley nut thread - 39 Packard SIX

Posted by jwblazek On 2019/12/14 12:42:19

Really buggered up the shaft on my generator, fell off bench ad clipped the metal cross member on my bench as I was doing final assembly after repainting it. Tried needle file to clean up the thread but they are pretty messed up and subsequently buggered up the nut as well

I am measuring it using a spark plug/pipe gauge as 3/8" pipe with a 1.25 mm pitch. Originally thought it was 5/8 - 18

Anyone know what the pitch is? Not going to be simple to replace, car has the rare tachometer takeoff off the back of the generator

Thanks in advance

John