Ender 3 - Filament holder DELUXE - back nut

This is a remix from Skrutt84's awesome project "Ender 3 - Filament holder DELUXE"

I couldn't find any M8 nylon lock nuts, so I had to use three standard nuts. Two of them are used as a nut and counter nut (as jam nut) at the end of thread bar. I thought, it can look better so I remixed a little bit "Mounting_bracket_nut" in order to cover and hide these metal nuts. Original "Mounting_bracket_nut" was just too short for me to use it at the back. Perhaps for you too, so I upload this ;)