I stopped using Stainless to replace any bolt that is grade 5 or higher. While high strength stainless bolts are out there, they are pretty expensive. (I used to have access to high strength SS bolts where I worked).
I didn't want the stainless bolts to break or shear off in critical situations.
I never had it happen, but I have become more conservative about safety in my old age.
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2364i (1541)
Kohler ECH23
Power Steering
54" Deck
451 Snow Blower
42" Plow
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