Bolted joints Instrumented washer Washer (patent pending). An instrument capable of measuring the tightening torque of titafonds(Draco®) or the efficiency of a bolted joint. TECHNICAL DATA SHEET Instrumented Bolt Instrumented bolt. Instruments capable of measuring the tightening torque of bolted joints.Only on order from 12mm diameter. The DRACO® system The IoT instrumented washer for monitoring the tightening torque of anchor bolts. Conference #VISIONESECURITY2021 Inventor's presentation 12 October 2021 - Autodromo Nazionale Monza