On Dec 7, 10:00*am, "Karl Townsend"
wrote:
My son just gave me a little job... I've got six aluminum pickup topper
clamps that used steel bolts. They are all corroded together. if you just
twist hard, the bolt will take the AL thread with it.

Short of cutting the bolt off, milling and tapping to the next size; how
would you repair this?

If you heat them up with a blowtorch, you might manage to undo the
bolts without damaging the thread. Sometimes heat can work wonders on
rusty fasteners.

Best wishes,

Chris