self drilling galvanized screws

A hex washer head bolt is essentially a threaded rod with a hexagonal head, providing a larger surface area than a standard hex bolt. The integrated washer portion of the bolt serves two primary functions. Firstly, it distributes the clamping force over a wider area, preventing damage to the material being fastened and reducing the risk of loosening due to uneven pressure. Secondly, it increases the friction between the bolt and the surface, enhancing the holding power and ensuring a secure connection.

...

Overall, 3 inch concrete anchors are an essential tool for anyone working with concrete surfaces. Their strength, durability, and ease of installation make them a reliable and cost-effective fastening solution for a wide range of projects. Whether you are a professional contractor or a DIY enthusiast, having a supply of 3 inch concrete anchors on hand will ensure that you are always prepared to securely fasten objects to concrete surfaces.

...