Stripped thread on IMS fuel tank.

[saklx650c]

So for some unknown reason (too me anyway!) there two outlets on the tank that do not have brass threads moulded into the tank. The thread in these seem to be a bit stripped even hand tight so does anyone know of away to repair/rethread etc these and what parts/bits can i use to repair.
I have searched this forum but it seems that plastic tank cracks are the main repair required.
Any ideas will be welcome.
Cheers