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6 mm Pot Shaft Weighted Spinner Tuning Knob
This 76 mm flywheel spinner knob fits a 6 mm potentiometer or variable-capacitor shaft (6.3 mm slip bore, 12 mm deep). One M3 heat-set radial insert locks it to the shaft. Eight M5 hex nut pockets (8.3 mm across flats, 8 mm deep) sit in the rim so you can add weight, and the finger dimple lets you spin it smoothly for VFO, SDR or attenuator tuning. It's a cheap stand-in for discontinued reduction-drive dials.
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