The point I was trying to make, was chassis screws for example bolted into plastic gearbox holders, you do them up sensibly tight, it would be nigh on imposible to set by torque acuratly.due to the fact that the plastic drags and the bolt isn't loose all the way to the head of the bolt.
I still fail to see how you can do up 3mm bolts into plastic tight enough to crush it causing tweak without stripping the threads.
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