Ribbed knob with hex nut pocket M5 - clamping knob, 4 sizes 20/25/30/36 mm, no supports

Fourteen deep flutes. Grips with oily or gloved fingers, which is why it belongs on machines rather than on a desk. Takes a DIN 934 hex nut M5 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. M5 is the T-slot size on 2020 and 3030 aluminium extrusion - the one you reach for most often on a printer or a CNC frame. ## Sizes in the download All 4 diameters, same shaft fitting: | Diameter | Heigh…

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