Confusing, isn't it! But, whether you have a large nut or a smaller nut, you still apply the same torque using a torque wrench or pulling at the correct force/distance on a breaker bar. The chance of rounding corners on a larger nut are less than on the small one but you still apply the same torque. That torque you apply with the wrench gets converted to forces acting on the nut, but this will still convert, when acting through the diameter of the nut, back into the same torque being applied. <img src="/forums/images/graemlins/confused.gif" alt="" /> Still clear as mud, isn't it!