Abstract—In joint of sheets, blind rivet assembly is considered one of the most important and suitable ways to achieve a big amount of shear stresses in the structure without failure, blind rivets describe a hollow body contain a mandrel or stem, and when the rivet is set, mandrel pull and the body are deformed to clamp and hold the materials of the plates together securely. Blind rivets are easy to install, versatile, and unlike many fasteners, the failure of lap joints is most likely to occur as a result of shear failure of the rivets itself or bearing failure (crushing) of the plate, or tensile failure of the plates of structure, alone or in combination depending on the makeup of the joints. This investigation is concerned to study the influence of hole diameter, length of the rivet, the thickness of joint and using washer on the secondary head side of the generated shear stress, the mechanical behavior, particularly, ultimate tensile strength were investigated using a universal testing machine. The result shows that the maximum tensile force to increase when the hole diameter increase, changing the length of rivet influence on the strength of the structure the maximum tensile force increases with an increase the length of rivet, Furthermore, maximum shear force increase with decreasing the thickness of sheets and using the washer produces same results as increasing the maximum shear force before failure of the structure.