本标准适用于钻孔、研磨、抛光、锯切和驱动螺纹紧固件的便携式电动工具，以及驱动螺纹紧件的手动工具。其他未归类为冲击工具的工具属于这一类别，可通过常规程序进行修订或添加。本标准包括驱动和从动元件的尺寸和公差，其中此类协调很重要，但未参考相关美国国家标准确定。所有尺寸均以英寸和毫米为单位。

This Standard applies to portable power tools for drilling, grinding, polishing, sawing, and driving threaded fasteners, and hand tools for driving threaded fasteners. Other tools not classed as percussion tools belong in this category and may be added by revision or addition through the usual procedure.This Standard includes dimensions and tolerances for both driving and driven elements where such coordination is important and not established by reference to the pertinent American National Standards. All dimensions are in inches and millimeters.