Because of something worse review, because too short a screw, I got me the part considered in more detail. Said screw connects tripod head and telescopic rod and has beaten 2 transitions to a diameter of 6.35mm, which is screwed into a half-uneaten Alugewinde. Since I am from specialist luckily, I've just made me screw this new, with a little more thread. The mating thread is cut deep enough (about 15mm deep) so it would have been no problem to leave the thread of the bolt longer. I have the tripod only reason not be returned because it is otherwise simple top and scores with the monopod and the good handling, .....
Too bad I can only give 3 stars here. But hardly imagine what damage is done when the little thread yields. Because pennies ....