At 3D Print Works we have designed this really useful 3D printed knurled nut. It simply transforms a standard M4 steel nut by encapsulating it inside the 3D printed part. It makes the small nut much easier to manipulate and hand tighten, there is no need for a tool such as a spanner. Great for those awkward to reach places.
We designed it to fit on the nut which adjusts the level of our Rostock Delta 3D printer bed.
Click here for your free download knurled nut from Thingiverse.