There are several types of fasteners used for attaching aluminum windows to frames, including: 1. Screws: Commonly used for their secure hold and ease of installation. 2. Nails: Quick to use but may not provide the same level of security as screws. 3. Adhesives: Can be used for a more permanent bond, especially in certain applications. 4. Clips and brackets: Used for a more visible, decorative attachment. 5. Rivets: Provide a strong, permanent connection but are not easily removable. 6. Dowels and pins: Used for a more traditional or decorative join. 7. Structural glazing systems: Employ silicone or other sealants to bond the window to the frame. Each type of fastener has its own advantages and is chosen based on the specific requirements of the project, such as load-bearing needs, aesthetic considerations, and the desired level of permanence.