This Standard provides performance and safetyrequirements for manually operated torque instruments,commonly used for mechanical measurement of torquefor control of the tightness of threaded fasteners. It isnot intended to describe products infrequently utilizedor those designed for special purposes.This Standardmay be used as a guide by state authoritiesor other regulatory bodies in the formulation of lawsor regulations. It is also intended for voluntary use byestablishments that use or manufacture the instrumentscovered.