The crowfoot acts like a lever, no? And levers multiply torque by trading distance. Draw yourself a schematic using levers and do the math. Guessing you'll be about right if you stal at the lower end of torque spec givrn tolerances and the crowfoot making a small lever. (but I don't knowe that.)

The key elements in human thinking are not numbers but labels of fuzzy sets. -- L. Zadeh

Which explains a lot.