Keystone Electronics Corp. Dual Pointer Control Knob 8566

The 8566 is a dual pointer control knob with a .250 inch (6.4 mm) shaft diameter, .920 inch (23.4 mm) height, and a .640 inch (16.3 mm) inside diameter. It features a colored polypropylene hub with a thermoplastic elastomer soft-touch gripping surface, a brass nickel-plated insert, and a nut clearance bore depth of .120 inch (3.1 mm). The knob has a .730 inch (18.5 mm) outside diameter and a .540 inch (13.7 mm) nut clearance diameter, designed for secure attachment with set screws.