M8 Hand Knob
thingiverse
My version of a block head nut. His didn't fit my 8mm screws, probably because his are different sizes. Don't know why. This Hand Nut fits perfectly with screws that have an M8 thread and a 12.8mm head size. I designed it specifically for my Printrbot Metal Simple and I achieved a super tight fit. Feel free to reach out to me if it doesn't work on your machine. Printed on a Printrbot Simple Metal at these settings: 0.2mm layer height 2 outer walls and shells 25% infill density 25% support material in the hole Using black PLA plastic at 185°C
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