ASME B107.300-2021

This Standard provides performance and safety requirements for manually operated torque instruments, commonly used for mechanical measurement of torque for control of the tightness of threaded fasteners; manually operated electronic torque instruments with integral or interchangeable heads, including requirements for endurance, torque value ranges, and accuracy for these torque instruments; and electronic torque testers, used for checking manually operated hand-held torque wrenches and screwdrivers. It does not cover products infrequently utilized or those designed for special purposes.

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