i have that exact stand, there is NO threading on top, just a 5/8" STUD. if you look at the specs it shows a picture of the studded tip and says 5/8" next to it. the air-cushioned stand they make which is about 10' has a 1/4" thread on it, but I still use the quick release adapter.
you either need a clamp or the quick release that I referenced above, i recommend the quick release as it is faster to put on and off the stand but more importantly it puts the weight directly over the top of the stand, which IMO helps make it slightly more stable, especially in the event it is kicked.
its definately not bogen quality construction, but it is a great stand, pretty large, with a hefty footprint, but I have found it to be an ideal festival stand, as it can go really high if the need be, and it heavy enough to be able to support a good bit of weight should others want to clamp on. definately well worth the $.