KB500B1/4 is a black machined aluminum knob designed for control and adjustment applications. It features a 1/4" shaft with a diameter of 0.251 inches (6.37 mm) and is secured with two NO. 6-32 set screws positioned 120° apart. The knob has a diameter of 0.500 inches (12.7 mm) and includes a lacquer-filled indicator line for precise positioning. With its compact design and durable aluminum construction, this knob is suitable for instrumentation panels, audio equipment, and industrial control systems where reliable manual adjustment is required.