This little script can be used to make chamfered hex rods.
Complete a hex nut with the makeThreadTap script: http://moi3d.com/forum/index.php?webtag=MOI&msg=5473.1
or make a hex bolt using the makeExternalThread script: http://moi3d.com/forum/index.php?webtag=MOI&msg=5451.1