Tightening Torque Calculator Tightening Torque Calculator Please select the bolt diameter and the grade to determine the tightening torque… Bolt Diameter (mm) 6 mm 8 mm 10 mm 12 mm 14 mm 16 mm 18 mm 20 mm 22 mm 24 mm Grade Grade 8.8 Grade 10.9 Grade 12.9
