| 摘要 |
The invention relates to a fastening element, with a nut body, wherein the nut body has a collar and a contact surface, and with a plate which has a contact face. The invention comprises the fact that the contact surface is designed to be curved outwardly in the form of a spherical cap in the direction of the contact face or that the contact face is designed to be curved outwardly in the form of a spherical cap in the direction of the contact surface. |
