本文件规定了用于确定航空锥形管螺纹是否符合本标准的航空国家形状（ANPT）管螺纹、量规和测量方法的要求。本标准涵盖的螺纹和量规适用于需要密封螺纹接头的航空部件和设备中的管道、塞子、配件和类似装置，以及直螺纹、垫圈或O形圈不足的地方。

This document establishes the requirements for Aeronautical National Form (ANPT) pipe threads, gages, and gaging methos for determining conformity of aeronautical taper pipe threads to this standard.Threads and gages covered by this standard are intended for use on pipe, plugs, fittings, and similar devices in aeronautical components and equipment requiring a sealed thread joint, and where straight threads and gaskets or O-rings are inadequate.