@pennsyfan posted:Does anyone know what these threads are?
I think your idea of swapping out the pictured pan head screw for a flat head screw might work. Perhaps a #4 wood screw with a flat head. The thread count likely does not matter for wood screws (like it does for bolts that must match a nut or threaded hole) - usually coarse or fine for wood screws. If the hole in the tie is too big for your new screw, you can pack it with tooth pick shavings and carpenter's glue, then drive the screw before the glue dries. This gives some clamping and the screw is usually very firmly embedded.
Additionally, I think there is enough plastic thickness on the switch motor housing to slightly countersink the hole - that would give you a little more clearance. Be cautious that you do not enlarge the hole too much.
If nothing works, could you mount the motor on the other side of the switch?
Good luck.
