The brim of the rivet cap of the big brim self-pulling rivet is larger than that of the common self-pulling rivet, so it produces a better direct contact area with the connected piece. The friction between the connected piece and the rivet riveted by the big brim self-pulling rivet is better and more stable. Large brim core-pulling rivets are widely used in the connection between connected pieces with high strength and special requirements or more easily damaged.