本标准旨在涵盖本标准所述各种类型英制系列方形和六角螺母（包括机用螺钉螺母和连接螺母）的完整通用和尺寸数据。附件还包括开槽螺母槽的测量、螺母扳手开口、尺寸数据所依据的公式以及轴承表面跳动的测量。应该理解的是，如果出现有关产品验收的问题，表格中的尺寸应优先于通过公式重新计算。

This Standard is intended to cover the complete general and dimensional data for the various types of inch series square and hex nuts, including machine screw nuts and coupling nuts, addressed by this Standard. Also included are appendices covering gaging of slots in slotted nuts, wrench openings for nuts,  formulas on which dimensional data are based, and measurement of bearing surface runout. It should be understood that where questions arise concerning acceptance of product, the dimensions in the tables shall govern over recalculation by formula.