自2007年9月起，本规范已被SAE航空航天材料部宣布“取消”，并被其取代，并已被AMS 2263取代。每当提及已取消的MAM 2263A时，应满足最新版AMS 2263的要求。通过这一行动，本文件将保留在航空航天材料规范索引的数字部分，表明其已被“取消”。本规范涵盖了适用于订购公制尺寸的镍、镍合金和钴合金无缝和焊接薄壁飞机管的既定公制制造公差。除非另有说明，否则这些公差适用于所有条件，并基于单个测量值。

This specification has been declared "CANCELLED" and superseded by the Aerospace Materials Division, SAE, as of September, 2007, and has been superseded by AMS 2263. The requirements of the latest issue of AMS 2263 shall be fulfilled whenever reference is made to the cancelled MAM 2263A. By this action, this document will remain listed in the Numberical Section of the Index of Aerospace Material Specifications indicating that it has been "CANCELLED". This specification covers established metric manufacturing tolerances applicable to seamless and welded thin-wall aircraft tubing of nickel, nickel alloys, and cobalt alloys ordered to metric dimensions. These tolerances apply to all conditions and are based on individual measurements, unless otherwise noted.