What is the reason for the loosening of the rivets after the blind rivets are riveted when the installation aperture and interlayer length meet the standards?

1. The nail body does not expand, and the nail core loses tension.

2. The hardness of the nail body is too large, the pulling force of the nail core is too small, and the nail body is not fully expanded or not fully expanded.

3. The size of the nail head is too large or the angle is wrong, resulting in too much sliding resistance and the rivet tube cannot be fully expanded in place.