The PKJ50B18 is a control knob from the PKJ series, designed for precise user input. It is constructed from durable, anti-static molded phenolic with a cosmetic black gloss finish, a spun aluminum inlay, and a brass threaded insert. This functionally rugged knob is designed to fit a 1/8-inch diameter shaft and is secured by a #6-32 heat-treated steel set screw. With its clear visual indicators and robust materials, the PKJ50B18 is ideal for control applications in instrumentation, audio equipment, and other electronic devices.