Some brands of these style fasteners are designed for PCB mounting. 
Make sure the design has hole sizes appropriate for the material. Do not simply use the hole recommended for metal. 
Then, make sure they are pressed flat. The fastener must end up with the threads perpendicular to the board surface. 
Cross threading will spin the fastener in the laminate.
Keep internal traces way, consider the diameter of the fastener, and the fact that is will displace board laminate material.
Contact off line to discuss brand specific recommendations, if this is not adequate advice.

Guy
 

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Ivan Feng
Sent: Monday, April 16, 2012 10:44 PM
To: [log in to unmask]
Subject: [TN] Self-clinching nut for PCB assembly

Hi Technetters

 

We have a design requires to mount about 10 self-clinching nuts on a 13*7 inch FR-4 PCB, it’s quite new to us and we are concerned a lot about adverse effect on PCB reliability.

 

Can anyone point me the right direct to investigate? What should we worried about?

 

Any suggestion is welcomed.

 

Regards,

Ivan

 

 


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