PKES140B1/4 is a large fluted molded phenolic knob with an integral skirt and white indicator line, designed for 1/4-inch shaft control applications. The knob features a spun aluminum inlay and is secured with a No. 6-32 set screw. Key dimensional specifications include an overall diameter (A) of 1.50 inches (38.1 mm), a body diameter (B) of 1.37 inches (34.9 mm), and a bore diameter (C) of 1.22 inches (30.9 mm), with a skirt height (D) of 0.118 inches (3.00 mm). The knob's shaft hole diameter (E) is 0.540 inches (13.7 mm) and the overall height (F) is 0.693 inches (17.6 mm). This knob is commonly used in industrial control panels, audio equipment, and instrumentation where a large, ergonomic control surface with visual indication is required.