Vargal® nuts are self-locking nuts with an external elastic spring which determines a radial deformation. Vargal®self-locking nuts have been succesfully used through the years in all security applications requiring:
excellent resistance to vibrations
high temperature applications
limited friction coefficient dispersion generated by the prevailing device
the possibility to reuse the nut without any decreasing of the removal prevailing torque
The nut prevailing torque is guaranteed by the action of the stainless steel spring, pressing on the collar with radial cuts.
More information regarding the characteristics of the nut, the size, the available materials and the possibilities of employment in the attached brochure.
More detailed information is contained in the "Technical Documentation " is available on request.
A new flyer is available with some examples of applications of VARGAL nuts in the railway sector.
Dax® self-locking nuts have a stainless steel AISI 301 insert on the top part of the nut. The prevailing effect is guaranteed by the insert, which undergoes an elastic deformation and adapts itself to the flank of the screw thread.
Toplock® self-locking nuts have an axial plastic deformation on three sectors on the top part of the nut.
The deformation regards the first external threads. The elasticity of the material allows the nut to return to the original shape when dismounted.
Cr3 white zinc plating