The 3009CC is a phenolic knob designed for rotary control and adjustment applications. It features a black G.P. phenolic (B11) construction with 12 equally spaced flutes at 30° angles, providing ergonomic grip and visual indexing. The knob has a maximum outer diameter of 1.50 inches with a 1.34-inch bore diameter, and includes a 5/16-18 UNC-2A threaded steel insert (zinc-plated) for secure mounting. The design incorporates precision radii (R0.16 and R0.23) and maintains tight tolerances (±0.005 inches for three-decimal dimensions). This knob is commonly used in industrial equipment, control panels, and consumer appliances where reliable rotary control and durable plastic construction are required.