how long is the pole and can it be used for a basketball pole?
You would need about 35 of these to reach the standard height of a basketball pole, plus more to anchor it in the ground, but since it's only threaded on one end it would be difficult to connect them all. Additionally, while these rods are strong, at that length I don't think you could support a basketball goal.
That said, you could, theoretically, build a truss structure with these rods with the proper TIG welding equipment. I think you'd be better off just buying a long steel pole, though I doubt you'll be able to buy one from Adorama. Maybe a Matthews Mombo Combo would do the trick?