Hexagon knob for D-shaft 6.0 mm - 4 sizes 16/20/25/30 mm, no supports

Six flats instead of eight. Reads as a tool size and looks right next to anything held by hex screws. Fits a 6 mm shaft with the flat at 4.5 mm. The bore is built to 4.6 mm, the knob-side figure from the OKW catalogue per DIN 41591 - the extra tenth is the standard's own clearance, not slop I added. ## Sizes in the download All 4 diameters, same shaft fitting: | Diameter | Height | Volume | Weight in PETG | |---|---|---|---| | 16 mm | 17.6 mm | 2.1 cm³ | 2.6 g | | 20 mm | 17.6 mm | 2.9 cm³ | 3.…

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