bosch brute hammer

[david]

One of three micro screws is crossthread and keeps backing out.

[Dennis]

You might want to try a heli-coil for that hole.

[GeneLanzl]

David, does your machine already have heli coils in the threaded holes? Mine is a 139 , I bought it used, and it has all the 6 holes fitted with heli coils, although only three are used. When one bolt broke off and I had to extract it, I just rotated the 3 hole flange 180 deg. and re-installed the bolts.