[JERRY2KONE]

The grading system works pretty much the same. Using stainless steel screws is just asking for trouble. Stainless steel is soft and will strip, twist, and shear off even under moderate torque. If you use a stainless steel screw, remove it and use it again it will break sooner or later. Under industrial rules it is never good practice to re-use hardware of any kind for safety sakes. Like I said I have not had a 12.9 grade screw break yet, and as long as you use reasonable torque they will hold up very well. Tonys screws are stainless and they look nice and shiny. If that is your goal and you want to continue using them, than I would say start using a torque screwdriver to avoid twisting off anymore heads. Still the socket/allen heads are too dammed easy to strip out. Why put up with it if you don't have to? Everyone has to work with what makes them happy. For industrial standards using steel screws in aluminum hardware also has its drawbacks, but as long as you are using BLUE loctite for moderate holding, and RED loctite for more permenant holding you will have no problems. Metal to metal fastening is not recommended. Good luck with that.