Knob Thule Alpine 500 roof ski snow case

Get a broken knob with hiden M6 nut inside on my roof case.

Design it, nut had to be install by top, and you can put some strong glue on it to be sure it won't move, thickness is 4mm betwenn the bottom to nut, with a 100% infill if you respect the side thickness /bottom / top setting, should be strong enough.