Rollbar Bolts

[TSM Locost]

I read somewhere that all vehicle construction bolts should be a min 8.8 sierra use 10.9 holding the front brake callipers on as std. Ford would not spend money on 10.9 bolts if 8.8 would be ok.
The majority of stainless bolts sold will be A2 unless specified as A4. Screwfix do list A4 as an option although i suspect that most IVA inspectors would not accept A4 in stressed areas.

Stainless A2-70 = 700N/mm2 Tensile Strength 450 N/mm2 Yield Strength
Stainless A4-80 = 800N/mm2 Tensile Strength 600 N/mm2 Yield Strength
Normal Steel 8.8 = 800N/mm2 Tensile Strength 640 N/mm2 Yield Strength



Hope that Helps.