This required both a considerable reduction in weight of the explosive package and the replacement of the elaborate cryogenic system with vacuum flasks for replenishing boiled-off deuterium.
The TX-16 shared common forward and aft casing sections with the TX-14 and TX-17/24 and in the emergency capability (EC-16) version was almost indistinguishable from the EC-14.
[1][2] Five units were manufactured in January 1954, and deployed in an interim "emergency capability" role with the designation EC-16.
These solid fuel thermonuclear bombs were far easier to handle, requiring no cryogenic temperature materials or cooling system.
It was replaced with the five EC-14 weapons brought up to an acceptable standard as the TX-14 and production Mark 17 nuclear bombs in mid-1954.