AMS2406P results from a Five-Year Review and update of this specification with additions to ordering information, update requirements to stress relief treatment (3.1.1, 3.1.1.1, 3.1.1.3), added standard wording for electrical contact points (3.1.3), updated type of parts to procedure (3.2.1), added fastener wording for hydrogen embrittlement relief (3.3), added dimensional inspection to thickness (3.4.1), clarified requirements for adhesion (3.4.3), added fastener wording for hydrogen embrittlement (3.4.4), added fastener wording to periodic tests (4.2.2), added standard lot wording to sampling and testing (4.3), updated test specimens to periodic and preproduction tests (4.3.2), added standard sizes to sample configuration (4.3.3.2, 4.3.3.3), updated wording in approval (4.4.1, 4.4.3), and added a standard environmental notice to notes.