Knurled straight plastic knob from Keystone Electronics with 0.250" shaft diameter. Features ABS body, spun aluminum inlay, and brass nickel-plated insert with two 8-32 set screws.
Keystone Electronics 8569 is a knurled, straight ABS knob with a cylindrical style and a line indicator on the side. It features a 6.35mm (0.250") shaft diameter, 23.00mm (0.905") diameter, and 20.10mm (0.791") height.