Clips
Metal cage nuts, to clip with front mounting ("Helical" type)
These parts are easily clipped by hand on the front face of supporting panel.They are designed to permit a premounting of the set screw-nut on the element to fasten.
Metal nuts with plastic cage, to clip with front mounting (MP5000 type)
These parts are clipped by 1/4 turn on the front face ot supporting panel.