Well, it is the ball that goes in the drag link, therefore could be called the "drag link ball", even though it is on the pitman arm.
I had to go buy one of those "drag link sockets" to deal with mine. There's one in the socket set down at my mom's place in California, but it wasn't readily available. I tried to get my sister to look for it, but she couldn't quite get what I was trying to describe.
It took some heat to get those drag link plugs out. But everything is rebuilt on mine now.
