Hi, a new STEP model file as attached will be released to DLC in about a week.
Jetson_Orin_NX_Orin_Nano_Module_3D_STEP_Model.stp (2.5 MB)
Below is what you will see in the new STEP file.
The Orin Nano Data Sheet has the SoC height with tolerances. The model doesn’t have tolerances for the location/size, but the TIM placement doesn’t have to be that precise. The white area is the die. The area around the die is an envelope version of the rest of the top of the SoC. This area should not be encroached on as there are on-module caps that could be damaged.