can you measure your flange thickness to know?
I didn't look closely at my flanges yesterday, but the flat washer may be too large OD and not sit "flat"
I do not mean to confuse nor contradict what the other posters here have stated, but I would want to know how well the bolts fit and not assume “one size fits all”
something else I would ensure is that the hole where the bolt head would be against needs to be champered to account for the 0.010 radius at the transition. I could see the bolt head not going down hard and thus result in bolts "loosen"
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