The MPKG40B18 is a control knob from the MPKG series, featuring a ribbed body and a cosmetic black gloss finish. Constructed from anti-static molded phenolic, it is designed to fit a 1/8-inch diameter shaft and is secured with a single #6-32 set screw in a brass threaded insert. This model includes a white line indicator on the side for clear positional feedback. With an overall diameter of 0.440 inches and a height of 0.470 inches, this functionally rugged knob is ideal for various control applications in electronic equipment requiring precise manual adjustment.