Since 1984, Pennsylvania-based American Metals Company has manufactured metal shims for machinery alignment, maintenance, and industrial applications. Its AMC Accu-size precut stainless steel slotted shims are marked with their thickness, while the company also produces custom shims and shim stock with support from an in-house registered professional engineer. American Metals says its products are used by major industrial companies and that its precut shims are referenced as the standard in every U.S. Department of Defense solicitation for that product.