If the bar is bent, we would certainly warranty it.
As far as threads are concerned, that is a customer intervention item and here is our stance regarding that.
"A note about jam nuts and the consumer's responsibility. The installer is the person or persons initially responsible for the proper setup of the suspension system and/or components and the initial tightening of the jam nuts. The consumer or vehicle owner is the person or persons responsible for maintaining the jam nuts tight. Jam nuts not only hold the orientation of a component or a joint, but their most important function is pre-loading the threads of the mating parts. Failure to not supply proper torque on jam nuts will result in the rapid deterioration of the threads in the control arm and will impose a "cause for concern" for the occupants of the vehicle. Failure to comply with the warnings headed in the directions regarding the amount of threads showing past the jam nut will also cause the same "cause for concern" for the occupants of the vehicle. All of the above items are the responsibility of the vehicle owner and or installer. If a threaded section of a component is bad it will show itself defective immediately. Threads that fail over time are due to improper maintenance of jam nuts and can be proven very easily. Thread sections not properly maintained or setup are not covered under warranty. This is the end user and installer's responsibility."
We typically hook the customer up with the part at cost, hopefully advise them as to what went wrong so it will never happen again and put them in a safe condition.
We apologize for anyone's inconvenience with this kind of issue. We are here to help...