Yes I can tell you what is wrong: the dimensions are in px which will cause Fritzing to guess at what DPI (72DPI or 90DPI or the current 96DPI that Fritzing I don’t think recognizes) and uses that. It sometimes gets it wrong (this is displayed in Inkscape):
I was not aware of DPI. I will keep it in mind in future productions.
I downloaded and tested Inkscape.
It was caused by the fact that the stroke is automatically set in Illustrator.
I will use Inkscape from now on. Thanks for answering a newbie’s question.
If you are new to making Fritizing parts then the tutorials I posted in another thread this morning will probably be of interest if you haven’t already seen them and we are always willing to help people make new parts.
Yes, as noted, you need to specifically set the stroke weight [in Illustrator] to something ridiculously small—I usually set it to 0.01pt (because I work with points for stroke width—this is 0.004mm, but 0.01mm would probably be fine, no pun intended, too) so that it is effectively zero.