Hi,

We have been having a problem with assembled PCB's having improperly 
torqued hardware and  making it out of the factory and think the 
problem is that the hardware loosens after wave solder.  We have 
done some simple experiments and confirmed that this happens.  The 
hardware is in common applications such as stiffener bar attachment,
voltage regulator attachment and connector attachment.

- Do any of you have experience with this?

- Do some types of hardware work better than others? 

- Is there a good guideline for proper torque specs for certain
types of hardware on PCB's?

Any information you could share would be appreciated.

Thanks

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