ISO 14405-1:2016建立了线性尺寸的默认规格操作器（见ISO 17450-2），并为尺寸特征定义了许多特殊规格操作符，用于线性尺寸。 “圆筒”，“球”，“圆环”，[1]，“圆”，“两个平行的4568相对平面”或“两条平行的相对直线”。 它还定义了这些线性尺寸的规格修饰符和绘图指示。 它涵盖以下线性尺寸: a）本地尺寸: - 两点大小; - 球形尺寸; - 截面尺寸; - 部分尺寸; b）全局大小: - 直接全局线性大小: - 最小二乘大小; - 最大内切尺寸; - 最小外接尺寸; - 最小尺寸; - 间接全局线性大小; c）计算大小: - 圆周直径; - 面积直径; - 体积直径; d）排序大小: - 最大尺寸 - 最小尺寸 - 普通大小; - 中位数大小 - 中档尺寸; - 尺寸范围; - 尺寸的标准偏差。 ISO 14405-1:2016定义了以下线性尺寸的公差: - 和/或 - 极限偏差（例如0/-0,019）; - 尺寸的上限（ULS）和/或尺寸的下限（LLS）（例如15,2最大，12分钟，或30,2/30,181）; - 符合ISO 286-1（如10 h6）的ISO容差等级代码; 有或没有修饰符。 ISO 14405-1:2016提供了一套

ISO 14405-1:2016 establishes the default specification operator (see ISO 17450‑2) for linear size and defines a number of special specification operators for linear size for features of size, e.g. "cylinder", "sphere", "torus,"[1], "circle", "two parallel opposite planes", or "two parallel opposite straight lines". It also defines the specification modifiers and the drawing indications for these linear sizes. It covers the following linear sizes: a) local size: - two-point size; - spherical size; - section size; - portion size; b) global size: - direct global linear size: - least-squares size; - maximum inscribed size; - minimum circumscribed size; - minimax size; - indirect global linear size; c) calculated size: - circumference diameter; - area diameter; - volume diameter; d) rank-order size: - maximum size; - minimum size; - average size; - median size; - mid-range size; - range of sizes; - standard deviation of sizes. ISO 14405-1:2016 defines tolerances of linear sizes for the following: - a + and/or − limit deviation (e.g. 0/−0,019); - an upper limit of size (ULS) and/or lower limit of size (LLS) (e.g. 15,2 max., 12 min., or 30,2/30,181); - an ISO tolerance class code in accordance with ISO 286‑1 (e.g. 10 h6); with or without modifiers. ISO 14405-1:2016 provides a set of tools to express several types of size characteristic. It does not present any information on the relationship between a function or a use and a size characteristic. [1] A torus is a feature of size when its directrix diameter is fixed.