[Gaz64]

Here's some examples, but we need to know the thread pitch as well:

32mm X 1 5 Metric Right Hand DIE M32 X 1 5mm Pitch | eBay

NEW 32mm 32 X 2 Metric Right Hand DIE M32 X 2 0 Pitch | eBay

Or how about a thread file:

Jawco 155 NU Thred Thread Restoring File SET SAE Metric Made IN USA Rethread | eBay

Have you crossthreaded the nut, or have the threads picked up from partial seizure?