The tensile force of 4× 12 aluminum rivet is 180kg. According to relevant public information, the torque of M4 can reach above 10kg, the tension can reach above 45kg, and the tension of four rivets with 12mm can reach 180kg. Aluminum rivets, in riveting, use their own deformation or interference to connect the riveted parts. Insert a metal rod-shaped part with a cap at one end into the connected part, and then punch out the other end at the outer end of the rod to press and fix the part.