i have downloaded part files from grabcad but unable to open them in nx as they have extension .prt.1.
how to open .prt.1 part files using nx.
Downloaded file are probably Pro/engineer files. Pro/e has the index number at the end keeping it like revision number. To be sure remove ".1" from the end of the filename and try to open in NX, if it can't be opened , it is definitely Pro/e file.
I have same problem