Originally Posted by JohnDThompson

No, you're unlikely to strip the threads using any hand tool, but if you rode for any length of time while the pedal was loose, the crank arm threads could have been damaged. If the damage is slight, you may be able to mitigate it by wrapping teflon plumber's tape around the pedal threads before installing the pedal. If that doesn't help, bring the crank arm in to a bike shop for replacement or helicoil repair.