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Thickness of tin/lead plate (Mil-P-81728)





2003

Hello,

We have tin/lead-plated copper parts from a vendor who was asked to plate to Mil-P-81728. This is a non-electronic component that will be solders to a circuit board. According to the information I have, the standard plating thickness is .0003" - .0005", but that for "brightened electronic components" the acceptable thickness is .0003" max. The parts we have meet our internal solderability spec, but are measuring under .0003" thickness (the surface is bright in appearance). Is this an acceptable part in anyone's mind? What spec applies in this case?

Thanks,

Mark Mozgowiec
- Cambridge, Massachusetts


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