Donsco Inc. is North America's leading Single Source provider of machined iron castings, and has been in continuous operation for more than 100 years. From our home base in southeastern Pennsylvania, we operate two foundries which produce short run and longer running gray, ductile, and alloyed iron castings up to 150 pounds in both horizontally and vertically parted molds. Our Wrightsville campus also includes extensive in-house machining and patternmaking operations (less)