Self Clinching Hardware


A self-clinching fastener is any device, usually threaded, that, when pressed into metal, displaces the host material around the mounting hole, causing it to cold flow into a specially designed annular recess in the shank or pilot of the fastener. A serrated clinching ring, knurl, ribs or hex head prevents the fastener from rotating in the host material once it has been properly inserted. Thus, self-clinching fasteners become a permanent part of the item into which they are installed.

They can be installed during fabrication or during final assembly to eliminate loose hardware. Self-clinching fasteners also support a thinner sheet metal, and permit a reduction in installation costs.

  • Provide strong threads or attachment in metal that is thin;
  •  Provide high push-out and torque-out resistance;
  • No special hole preparation, such as chamfering and deburring;
  • Reverse side of metal sheet remains flush , no swaged rim projects;
  • No re-tapping necessary; and  
  • Lower installation costs.

Penn Engineering