First, screw the R-Best rivet nut into the threaded mandrel to apply a regular guaranteed load, and hold for 15s, the rivet nut should not trip or crack. After the load is removed, the rivet nut should be unscrewed by hand or can be unscrewed by hand after lightly riveting the nut. During the experiment, the moving speed of the chuck should not exceed 3mm/min. In the experiment, if the threaded mandrel is damaged, the experiment will be discarded. The hardness of the threaded mandrel should be ≥45HRC. The thread service is 5h6g, but the Dajing should be controlled within a quarter of the 6g service belt close to the lower limit.

Secondly, screw the rivet nut into the threaded mandrel to apply a load until it cracks. The crack should not occur at the junction of the head and the cylindrical part; the load value should comply with the rules. During the experiment, the moving speed of the chuck should not exceed 3mm/min. In the experiment, if the threaded mandrel is damaged, the experiment is scrapped.

Then rivet the rivet nut on the rivet mounting plate, and screw in the experimental bolt without any smooth conditions. Apply torque until the rivet nut cracks or the thread trips. The torque measurement error of the torque testing machine or tool used in the experiment should not exceed 2% of the maximum rated torque. The thickness and hole of the riveting plate are in accordance with the rules of the maximum riveting thickness h and d0 or s0 recommended by the product standard.

Finally, the rivet nut is riveted to the riveting mounting plate, and the test bolt is screwed in without any smooth conditions. Apply torque until the rivet nut and the riveting plate produce relative rotation. The torque measurement error of the torque testing machine or tool used in the experiment.

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