You give the stud info that you have but don't tell us what you are working on. Just a 9" drum is vague. Year/make/model, That is the way to find the correct part.
so sorry, my bad. Wheel studs are for a 1968 Dodge Dart 270/SL-6, 9 in drum brake(s) on all 4 wheels. Buggered up threads on only 1 drum, 1 stud, F/R., right at the very end of nut travel....darn!!!!!! Don't know how this happened.
I am going to try to restore threads with a LANG 7/16-20 die.