About Us: The Fox Valley Spring Company has been manufacturing springs since 1989 in our state-of-the-art 77,300 square foot facility in Appleton, Wisconsin. With our automated computer controlled spring coilers, we are able to manufacture complex springs for any application. Whether you are looking for Compression Springs, Extension Springs, Torsion Springs, Wire Forms, Die Springs, Flat Steel or a custom made spring, Fox Valley Spring is your best choice. ISO 9001 2008 & ITAR Certified Mission: A customer service company that happens to make customer springs and wire forms.