Special Notice from the Department of Defense: The procurement target is a regulator, oxygen, DE with the NSN 1660-01-473-3549BO. This item is typically used for aircraft air conditioning, heating, and pressurizing equipment. The top drawing for this item is 16VK059-2 and the EDL revision and date are 2 / 31 AUG 2021. The MDC code is EEB and the IM name is DINH, VIVIAN U. For more information, please refer to the solicitation information to follow.