| 摘要 |
<p>A U-shaped sheet metal clinch nut 10 receives an extruded portion 32 of a workpiece 30 in an aperture 16 in a first arm 12, and rotation preventing teeth or serrations 24 lock the nut against rotational movement. A self-tapping fastener 34 is inserted, creating threads in the workpiece extrusion 32 and then in a second arm 14 of the clinch nut. Tightening of the fastener causes the second arm to deflect towards the first arm 12, thus locking the fastener 34 against retrograde movement. Also disclosed is a simple tool for advancing an interconnected strip of clinch nuts, severing the leading nut, and staking the workpiece to it. <IMAGE></p> |
