The McDonnell Douglas KDC-10 is the largest transport aircraft of the Royal Netherlands Air Force. It can transport large amounts of cargo and personnel quickly and over long distances. The KDC-10 also serves as a flying gas station. They can refuel not only their own F-16s and F-35s in the air, but also aircraft from other countries.
Scroll through 8 pictures from welding two new 17-4PH studs for aft centerbody on the CF6-50 turbine engine of the KDC-10
17-4PH qualified welding according AWSD17.1