I was curious about how strong the aviation grade bolts are. With help from the University in Delft at the faculty of Aerospace Engineering I did some tension tests.
I tested the standard AN3 bolts (125 kpsi) and also the stronger NAS6603 shear bolts (160-180 kpsi) in combination with a tension nut AN365 (125 kpsi).
The result was surprising, at around 12000 Newton / 1200 Kg / 2640 lbs the maximum force was reached but the bolts didn’t break. The threads of the nut were stripped off.