Locking nut for cheap metal detector shaft
thingiverse
18 mm/22 mm diameter aluminium shaft, the thread pitch is 1 mm It is similar to the part E in the following diagram: https://www.barskasupport.com/spare-part-order/lock-nut-assembly You could complement it with https://www.thingiverse.com/thing:3541435 It is originally for https://www.jula.no/catalog/fritid/fritidsaktiviteter/metalldetektorer-og-kompasser/metalldetektorer/metalldetektor-150058/ Marquant Metal Detector but it seems similar to the Barska Master edition metal detector.
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