Collet knob for Round shaft 5/16 in (7.9375 mm) - 4 sizes 20/25/30/36 mm, no supports

Collar at the bottom, waisted, knurled head - the tall shape from valve radios. Sits high enough to reach past a recessed panel. 5/16 inch is 7.9375 mm. The nearest metric shaft is 8 mm, and a knob bored for 8 sits loose on this one - six hundredths sound like nothing until the knob wobbles. ## Sizes in the download All 4 diameters, same shaft fitting: | Diameter | Height | Volume | Weight in PETG | |---|---|---|---| | 20 mm | 19.6 mm | 3.4 cm³ | 4.4 g | | 25 mm | 19.6 mm | 4.1 cm³ | 5.2 g | |…

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