The mechanical properties of stainless steel (eg strength, ductility), and how well the alloy CDI Torque Products is not responsible for any application of torque or it’s consequences as a result of using this chart. Recommended Bolt Torque Values for Stainless Steel and Nonferrous Fasteners (inch series). Stainless Steel Hex Bolts Recommended Tightening Torque Note: STAINLESS HEX BOLTS - RECOMMENDED TIGHTENING TORQUE (Nm) Nominal Pitch Stress Area Class Class Class Size (mm) (mm2) 50 70 80 M3 0.50 5.03 0.4 0.9 1.2 M4 0.70 8.78 1.0 … For standard bolt torques use 0.