My usual procedure is to send two files – one a pdf of the full drawing and a dxf file of the other with a bare outline of the part, including one dimension to check scale. I also append a note with thickness and material on the dxf. I used to add a clue to the size of the drawing – so the filename is eg. XYZ-123 – A4 – Iss 1. This helped back in the day when we updated the drawing so that we got the revisions done and didn't get sent an obsolete part.
This is how I used to deal with it professionally and it worked well.