Self-contained, combined wrench and marking system, and method for installing a fitting and for automatically marking an installed fitting. The self-contained combined wrench and marking system has a wrench that may include a wrench head for rotating a fastener during a fastener tightening operation, a torque measuring mechanism for measuring a torque applied to the fastener during the fastener tightening operation, and an angle measuring mechanism for rotating the fastener to a preset angle during the fastener tightening operation. The self-contained combined wrench and marking system also has a marking system for automatically marking the fastener after the torque is applied to the fastener and after rotating the fastener to the preset angle.