So.... here is a pic of the OEM drawbar off my 2009
M6040. Kubota says the drawbars on the
M5040,
M6040 &
M7040 are all the same.
View attachment 478221
Now for some measurement data--
the bar dimensions - 24 1/8" OAL, 2.5" width, 1.25" thick
Starting with the largest hole(implement pin attachment hole) on the far left
First hole - 1 3/8" diameter - 1.5" from end of bar to center of hole
Second hole - 3/4" diameter - 7 3/4" from end of bar to center of hole
Third hole - 3/4" diameter - 9 3/4" from end of bar to center of hole
Forth hole - 1" diameter - 20 7/8" from end of bar to center of hole
Fifth hole - 1" diameter - 22 3/4" from end of bar to center of hole
The first large hole is for attaching the implement to the dawbar, hole #2 & #3 are just random attachment points and #4 & #5 are alternate locations for attaching the drawbar to the tractor.
I don't keep the DB attached - it sticks out far enough to interfere with some of the 3-point attachments.
It would seem that the width, thickness and drawbar attachment hole(s) diameter would be somewhat critical. The length and remaining three holes would be specific as to how you intend to use the drawbar.