Thread-forming screws that are dual heat treated, self-tapping fasteners that provide the strength, ductility, and resistance to embrittlement failures required in critical curtain wall and dissimilar metal applications. Check out Allfasteners range of thread forming screws for more of the industry's premier fasteners source. Inquiries? If you're not sure which thread forming product to use for your application, you can get free pre-purchase advice from our representatives now, by calling 888.859.6060 or via email. At Allfasteners, we have staff who have engineering and building backgrounds, so you can rest assured that our hands-on experience will help you get the job done properly.