Beware, Weak welding of the nut in the tube that connects to hitch rack

The nut that accepts the threaded bolt (which connects the bike carrier to the hitch rack) is welded and the welding is defective. One trip is all it took for the nut to come loose and so, it is broken. Cannot tighten the bolt anymore. Luckily the pin stayed, otherwise it could have caused a major accident because the bike carrier could have come loose with the bikes and hit any cars behind us. So, watch out. This is not acceptable at all. Now, I have to manually saw the bolt out and somehow remove the rack to return. What a pain!

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