standard torque tables. They list the torque by nut/bolt size and if lube is used or not.
A couple of examples can be seen at;
http://raskcycle.com/techtip/webdoc14.html
or
http://www.pearl1.org/standards/Tables-Section-6000/6001%20Table%201%20US%20Standard%20Bus%20Connection%20Bolt%20Torque%20Values.pdf
I looked it up at a number of places and took the avg. But all the ones I looked at are about the same.
Greg