Dont use a rigging
fitting such as this when its been abused. Once the threads have been stretched, they will find it all too easy to do it again, just when you dont need failure like in a storm.
They can be so easy or so hard to screw together, its a fine line between right or wrong and by the time it tightens up so much you realise its wrong, the threads have already been crossed and its scrap.
I know cos ive done it, to my shame.