There are many places where we use rivet nuts, so there is a great possibility that blind rivet nut will be used, but we will have some mistakes when using blind rivet nuts. Let's take a look at two of them.
The washer of the screw and nut is too large: Sometimes because of the lack of a suitable washer, some people use a washer with a larger inner diameter instead. In this way, the contact area under the head of the bolt with the washer is small, the bearing pressure or locking force of the washer is reduced, and the bolt is easy to loosen under the action of vibration and impact load.
The torque of the screw and nut are inconsistent: Many people think that the screw and nut should be "tighter than loose", so they consciously increase the tightening torque of the screw and nut, resulting in the screw and nut sliding buckle. On the other hand, it is important for the need to tighten with torque. Some people try to save trouble and use an adjustable wrench to tighten the screws and nuts. As a result, they often loosen due to insufficient torque, leading to mechanical failure.
In addition to blind rivet nut, countersunk head rivet nut is also the same, you should pay attention to some misunderstandings when using it.