Abstract: A fastener is staked to a sheet of equal or higher strength material. The fastener can be staked to a substantially circular shaped opening in the sheet material but other shapes of openings can be used. The opening is prepared by forming serrations in at least a part thereof. The serrations can take many forms and depths depending on the requirements for the particular application and materials being used. The serrations are formed by a doming tool and a punch tool aligned on opposite sides of the sheet material coming together to create the serrations. The nut is inserted into the serrated opening in the sheet material and force is applied to the fastener causing at least a portion of material of the fastener to flow at least partially into the serrations and secure the fastener to the sheet material.

Abstract: A fastener is staked to a sheet of equal or higher strength material. The fastener can be staked to a substantially circular shaped opening in the sheet material but other shapes of openings can be used. The opening is prepared by forming serrations in at least a part thereof. The serrations can take many forms and depths depending on the requirements for the particular application and materials being used. The serrations are formed by a doming tool and a punch tool aligned on opposite sides of the sheet material coming together to create the serrations. The nut is inserted into the serrated opening in the sheet material and force is applied to the fastener causing at least a portion of material of the fastener to flow at least partially into the serrations and secure the fastener to the sheet material.

Abstract: A self-clinching fastener for insertion into ductile sheets of varying thicknesses has increased push-out and torque-out resistance. The self-clinching fastener includes a plurality of radial projections and spline teeth that embed into the ductile sheets, causing the material to cold flow into a recess, thereby permanently clinching the self-clinching fastener to the ductile sheet.

Abstract: A self-clinching fastener for insertion into ductile sheets of varying thicknesses has increased push-out and torque-out resistance. The self-clinching fastener includes a plurality of radial projections and spline teeth that embed into the ductile sheets, causing the material to cold flow into a recess, thereby permanently clinching the self-clinching fastener to the ductile sheet.

Abstract: A self-clinching fastener for insertion into ductile sheets of varying thicknesses has increased push-out and torque-out resistance. The self-clinching fastener includes a plurality of radial projections and spline teeth that embed into the ductile sheets, causing the material to cold flow into a recess, thereby permanently clinching the self-clinching fastener to the ductile sheet.