PROBLEM TO BE SOLVED: To provide a cooling device which protects electronic components mounted on an aircraft or other vehicles that operate in extreme temperatures from overheating.SOLUTION: A structural cold plate assembly 14 includes: a support structure 16 including first and second opposite sides 18 and 20 supporting corresponding cold plates 22 and 24; and insert members 34 and 36. The insert members 34 and 36 define a portion of a fluid passage through the support structure 16 and secure the cold plates 22 and 24 to the support structure 16. The example threaded insert members 34 and 36 include a fluid passage for communicating a cooling medium from the one cold plate 22 through the support structure 16 to the second cold plate 24 disposed on the opposite side 20 of the support structure 16.