New Pitman Arm Help Please

Buy another pitman arm in person at NAPA . Never bought one thing from rock auto that fit the first time. Bought a tie rod once and I went to turn the nut just a little more to get the cotter pin in and the threads snapped off. I find now all the parts I order on line are junk. The best way to buy parts are cash and carry at your local supplier and take your old one with you.