| This is a reply I did from a similar post a bit back -
normal Zinc plated bolts have a tensile strength of 500 Newtons/mm2
stainless steel basically starts at 500 N/mm2 for class 50 up to 800 N/mm2 for class 80.
High tensile bolts are about 800 N/mm2 - usually stamped 8.8 on the head.
So if you want to be really sure about the strength get some stainless steel grade A4 class 80. Alloy fasteners have a huge range due to the various metals available, but are unlikely to be over class 80 on a bike.
also you have to be carefull about putting stainless bolts into alloy as disimilar metals react with each other causing corrosion, this can be prevented using copaslip or similar, you then have to reduce the tightening torque to copensate for the lubricate tread - to about 60% of the stated torque. |