[left that other site]

I noticed that the offending (METRIC) nut was welded onto the part, so although the Bolt-hole was the correct size, the wrong nut was selected.

Maybe the factory got a wrong shipment of nuts, and the whole run of parts had the incorrect threading.

I am just glad that my brother had the correct “tap die” to perform the procedure of changing the threads. He didn’t have a whole set of them...just one rusty one at the bottom of a tool box, that had been given to him by the widow of a friend of his, which JUST HAPPENED to be the correct size.

Now how’s THAT for a Mystery?

[Kathy in Alaska]

The exact tap die you needed? Not bad....d:o)