Is 3600 RPM too much for the blade grip bolts on a flybarless 450 Pro?

Should I worry about the blade grip bolts on my 450 Pro FBL turning 3600 RPM at the beginning of my flights? I looked at them and swapped them which they seemed fine and I am using 12.9 grade on the replacements. I was hoping to hear from guys running higher headspeeds for months and even through crashes and beyond..

Anyone running very high headspeeds can you tell me what your blade grip bolts look like.. Do you run stock, did you choose 12.9 grade and etc..

Thanks