What is the difference between breakaway torque and rotational torque?

Breakaway torque is the torque required to start

the initial movement, in the loosening direction, of a bolt, screw,

or nut from its (non−loaded) at rest position with the locking

element engaged.

Tightening torque is the torque necessary to move

the bolt, screw, or nut along its threaded length in the tightening

direction.