SCH Control Knob RY5090 Numbered 0-9 Dial Black Industrial Replacement Part SCH RY5090 control knob is a durable replacement part designed for precision adjustment. This black plastic knob features a numbered dial from 0 to 9 on a cream-colored face, protected by a clear overlay. The underside is stamped with the model number RY5090 and the SCH brand mark, ensuring compatibility for specific industrial or electronic equipment. It has a fluted grip for easy handling and a standard center mounting hole. Brand: SCH Model: RY5090 Material: Plastic Color: Black/Cream Type: Control Knob Shape: Round Grip: Fluted Dial Markings: 0-9 Mounting: Center Hole Application: Industrial/Electronic Keywords: Vintage Electronics, Replacement Part, Control Dial, Industrial Knob, Equipment Repair, SCH RY5090, Numbered Dial, Potentiometer Knob, Rotary Switch, Machinery Part #Vintage