I have a #130 look-a-like, might be a Sargent-made. Knob bolt had rusted enough that it snapped off when I tried to remove it. Wound up having to drill out the little bit down in the hole. Per George Wilson, I modified a tap into a "second" tap"and drilled a #7 hole into the boss, taking out the old bolt. Knew I was getting that out, rust was coming up out of the hole. Tapped the new 1/4"x 20 threads. Now the question is....... which type of bolt to use?SDC13542.jpgthe shiny Steel one? Or,SDC13550.jpgthe shiny Brass one?