Using the 110.3(B) is a "cop out". You can use the stab-in connections on the back of switches and receptacles "according to (specs)", but that dioes not make it better, not even equal to, the quality obtained when wrapping a conductor around and tightening it with a screw.

Using set screw connectors does not make it better, or even equal to, getting a pair of channel locks and locking a coupling or connector onto a piece of pipe.

But if you really do want to look up the torque on a set screw connector, check the NEC - it will refer you to the White Book - that will refer you to the manufacturer, that will not even ask the tensile strength of the pipe you are using.

Have you noticed that different manufacturer's steel have different hardnesses, even though they are with toleerance of the UL (but maybe not with in tolerance of an electric/hyrdaullic bender?

Using set screw connectors on some piepe is like using aluminum instead of copper connectors - it will be tight when you finish, but will not stay that way ...