To fix elements with metric bolts in a panel with holes
The nut is slid onto the panel edge and over the panel hole (or through a second hole when fitted mid panel)
The element is positionned over the nut and linally the bolt (and washer if needed) is inserted the element into the nut and tightened
Design allows variable panel thickness with the thread remaining parallel to the surface
If nut to be pre-assembled, use the version with the retaining tab (to prevent the nut from moving during transport for example)