| 摘要 |
<p>A blind fastener of the pull through rivet type having a mandrel disposed in a hollow rivet having a flange end and a forming end, the mandrel has a head disposed adjacent the forming end and adapted to be pulled through the rivet body. The invention being in the mandrel head having a predetermined configuration acting on the forming end of the rivet while being pulled through the rivet body to upset the forming end of the rivet to provide inwardly disposed flanges. Additionally, the mandrel head configuration also upsets the rivet body and the opening in the workpiece enabling the rivet to have optimum torque carry capacity.</p> |
