What is the size of the Jam nut I need for the front control arm?

Just going based on this.

What is the size of the Jam nut I need for the front control arm?

Which says it's for a 9" drum. Bottom line is you can measure the nut and threads and google it. That one is a pack of five, not difference sizes...
Good Idea. I will get my micrometer out and measure. Link u sent from amazon has several different sizes u can click on