Track bar fell off while wheeling today: Anyone know the bolt size?

That looks like good times! Seriously. Sad to say... I love wrenching more than wheeling.

Stereo going and a beer... Wife cooking some steaks....

Damn I love it. Thanks for the pic!
I went to dealer for bolt and nut. The nut is no longer a flag, but the tapered end of the bolt makes it start easy.