Bolts today are typically Chinese junk. We have a huge list of counterfeit bolts that we cannot use. Not all are the same.
With that said, anyone who can shear a 5/8" bolt in a mild steel tube receiver should get some national recognition.
The reference to the man killed by the flying receiver failed to mention it was a drop hitch that broke at the weld....not the pin.
To put a receiver in perfect shear would require dead even tongue height. Most hitches are some level of drop and that acts much like the sliding side of a pony or bessey clamp.....you're not likely to break even a diamond hard or butter soft one.