27f58cad___Academy_of_Aerospace_Quality__Section
[Term] Code X [Definition] Used to identify critical end-use items, military-essential items, and medical items with a shelf life greater than 60 months. A critical end-use item is any item that is essential to the preservation of life in emergencies or any item essential to the performance of a major system. [Section] 
Shelf Life Control
Glossary | Academy of Aerospace Quality
Section