A surgical instrument can comprise an end effector, a first drive configured to perform a first end effector function, a second drive configured to perform a second end effector function, and a rotatable shaft. The rotatable shaft can comprise a first thread, wherein the first drive is engageable with the first thread to perform the first end effector function, and a second thread, wherein the second drive is engageable with the second thread to perform the second end effector function, and wherein the first thread is at least partially coextensive with or overlaps the second thread.
