I have a DeWalt router with a damaged thread in the base.  I looked up the part for the screw and found one site that says M4X10.  I assume the M4 is 4 mm but I don't know, I'm not familiar with these measurements.

I want to find a tap to chase the threads but I don't know what to get.

Any help is appreciated.  I need to finish this job and move to the next.  Warm weather is on the way and that means I get out of the shop.

Thank you,

(router screw (full).jpg)

router screw (full).jpg (14KB - 23 downloads)