50 ~ This set of brass rivets is perfect for those in need of tubular and semi-tubular fasteners. The rivets have a 3/16" stem diameter, a 3/8" head diameter, and are 5/16" long. They are ideal for use in various industries such as business and industrial settings. The rivets are made from high-quality brass material and are designed to provide a reliable and secure grip range of 3/16" / .187. With this set, you can rest assured that you are getting a top-notch product that will meet and exceed your expectations. These rivets are perfect for use in a variety of applications, including but not limited to, tubular and semi-tubular structures. So, whether you are a professional in the industry or a DIY enthusiast, these brass rivets are an excellent choice for your fastening needs.