Column 4 - Primary Hazard Class & Division
Column 4
Hazard Class contains: Primary hazard class and division numbers (when this manual references hazard class, it includes any division number as appropriate such as 2.3, 5.1, and so on). For Class 1 Explosives, the compatibility group is also given. Refer to A4.2 for additional information on class and division.
Some items that contain explosive materials may be assigned to a different class than Class 1 by DOD explosives hazard classification approval authorities. This is due to the predominant hazard (A3.3.4.4). Compatibility group letters assigned to a non-Class 1 material do not apply to military air transportation.
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