THREAD SIZE NEEDED

Thank-You. I need to order a thread chaser.:thankyou:

P.S. Are the nuts and/or shaft an interference fit, or can I just chase both sets of threads with a standard tap and die?
the shaft is a light interference fit at the shoulder where it goes into the control arm. the shouldered nut there is standard. the large nut at the front is somewhat interference fit. not full on stover, but definitely has some toofs to it.