I vote for drilling and threading. So here is my way:
1.1" or 1.25" or 1.5" steel shoulder bolt (screw) 5/16"-18, shoulder 3/8". get any size you like.
2. Drill bit 17/64" Cobalt
3. 5/16"-18 tap set of 3 ( tapper, plug, bottom)
4. Red thread locker or any high strength epoxy.
5. My experience in metalworking.
6. I have the multi process welding machine but I prefer a simple way.