This Standard provides performance and safety re-quirements for manually operated torque instruments,commonly used for measurement of torque to control the tightness of threaded fasteners. It also provides performance and safety requirements for manually oper-ated electronic torque instruments with integral or inter-changeable heads. It includes requirements for endurance, torque value ranges, angle measurements, and accuracy for these torque instruments. It further provides performance and safety requirements for elec-tronictor quetester susedforchecking manually operated,hand-held torque wrenches and torque screwdrivers. It is notintended to describe products infrequentlyutilized or those designed for special purposes.
