Countersunk Rivets with 120 degree flush head design.
Countersunk rivets is one of the most popular fasteners used to hold things together. The aircraft industry as well as many consumer and industrial applications utilize countersunk rivets are part of the open end blind rivet family. The reason is simple, once set in place they can provide a flush surface on the finish or visual side of the application. This is an important feature for aircraft wings as well as many industrial applications. The most common degree of the countersunk is 120 degrees. This is an important feature when designing the application holes as they must also have 120 degree countersunk in the finished side of the application so the rivets will sit flush when inserted and set.