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 co- extensive with or overlaps the second thread.