Octagon knob with hex nut pocket M3 - clamping knob, 4 sizes 16/20/25/30 mm, no supports

Eight flats. Twelve would have been invisible - the faces would sit less than one percent below the circle. Eight sit at 92.4 percent, and that you can see and feel. Takes a DIN 934 hex nut M3 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. M3 is the size for camera plates, small jigs and enclosure lids. ## Sizes in the download All 4 diameters, same shaft fitting: | Diameter | Height | Volu…

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