Dome knob with hex nut pocket M4 - clamping knob, 4 sizes 20/25/30/36 mm, no supports

A dome over a knurled band. The dome is deliberately flatter than a hemisphere: a true half-sphere would print at 65 degrees of overhang and need supports. Takes a DIN 934 hex nut M4 from the back - the thread is steel, not printed plastic, so it survives being done up hard. The bolt runs right through, so its length does not matter. M4 is what most printer beds, carriage plates and small fixtures use. ## Sizes in the download All 4 diameters, same shaft fitting: | Diameter | Height | Volume |…

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