Calculate the maximum torque and load for different types of bolts: BA BSF BSW Metric Coarse UNC BS970 UNF BS970 UNC ASTM UNF ASTM Mach. Screw The calculated values are the maximum recommended values, based on 90% of yield. If your bolt is not listed, enter the values of your bolt by hand. For more information about the equations used to calculate the torque, check out http://torquecalculator.jwankel.envire.de