ESF

The ESF riveting nut is suitable as a thread on a thin sheet of a minimum thickness of 1mm. Usable on all metal constructions as well as on some composite constructions.

The ESF riveting nut must be mounted in the sheet metal in a calibrated hole. Knurling on the nut allows rotating locking once set.

The principle of self-locking is obtained by making a calibrated slot in the upper turret of the nut which is then crushed under a specific load to obtain a permanent deformation of the slot (elastoplastic deformation). During assembly, the deformed slot in the upper turret of the ESF nut is pushed by the thread of the male element. This thrust generates pressure on the side of the thread of the male element on a sector creating a constant braking torque (called self-locking). This self-locking torque is independent of the tightening torque applied when tightening the ESF nut.