Alpha Single-Gang 9mm Right-Angle PC Mount (11 Detents, 6mm Shaft)
6 mm diameter shaft. See SKUs 1018A & 1018A1 for replacement nuts. The 50K linear value of this part is a work-alike for the Mode control on the BOSS DD-20. The OEM part has a "D" shaft, so, WEARING GOGGLES, use a cutoff wheel to slice down the full-round shaft of SKU 1012A2.