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I am not a Metalurgist, I am a tool and die maker and a mechanic. The best way I can explain "gauling" is that it is metal fusion. That is to say there is interference between the two metals, usually both soft, and they litterally melt at the threads, and metal is transferred. Similar to cross-threading. EVERY time I bolt something together, I make sure, with my fingers, that the nut will go full depth on the threads. If it doesn't I make it right. I bought am item , back a few years ago, and fine thread nuts were supplied with course thread screws. As I am sure this was not true in your case, I would blame the problem on poor quality metal. Many people have misconceptions about stainless steel. MILD stainless has less tensil strenght then mild steel! Put a stainless nut on top of a battery, and see what happens in a few days. With a NEW nut and BOLT, the nut should have a very small amount of wiggle. This is true with NYLEX untill you enter the plastic. --Just MY 2 cents again------
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