bolt in frame broken

[GRUNTMAX]

Just a Question if I may?

Why High Tensile?
By memory only; Im of the belief that most Car manufacturers do not fit seats with 8.8 Hi Tensile bolts simply because in case of an accident, these bolts may snap, rather than stretch, during/because of impact.
So with that in mind.........should these bolts be Hi Tensile?
Are they Hi Tensile as per Standard?

Maybe just replacing them with Solid Bolts (non Hi Tensile) may be best?
Just putting it out there. :)

Hi Tensile bolts will not fatigue like mild steel bolts or mild steel OEM Suzuki bolts with holes in them. Look at the photo. Nothing about a bolt being able to stretch like a mild steel bolt, but all to do with shear strength. With Kevin, only 1 bolt sheared through fatigue , with mine, both sheared through fatigue at the same time with weight in Ventura bag, & I never went over a road bump when it happenned.
Suzuki's holy sub frame bolts are a poor man's hi tensile bolt.