Cusser
+1y
I'm too impatient; unless I wasn't in any hurry, I probably would've called Rock Auto customer service, told them about the cross-threaded part, and either try a metric die or cut off the bad part and "fix-up" the threads, as I bet the stud would still be plenty long. But I'd sure be pissed. And if that didn't work out, then I'd have the replacement one sent out. You likely were sent a "customer-returned" part initially.
Looks good !!!
First photo above: believe that's the AC evaporator case.
Second photo: that's the AC evaporator, not the heater core. See the brass expanision valve at the top right?