取消并替换第一版（1985年）。规定了适用于航空航天结构中使用的标称螺纹直径范围为3 mm至24 mm的所有类型公制螺栓和螺钉的形状和位置公差。用于起草航空航天产品标准。

Cancels and replaces the first edition (1985). Specifies the tolerances of form and position applicable to all types of metric bolts and screws in the nominal thread diameter range 3 mm to 24 mm used in aerospace construction. Intended for the drawing up of aerospace product standards.