SKU 1155 is a phenolic control knob manufactured by Davies Molding LLC, designed for manual adjustment and control in electronic and mechanical equipment. The knob features a black phenolic material construction with a matte finish and white paint-filled detailing, providing durability and aesthetic appeal. Key technical specifications include an outer diameter of 1 3/8 inches (34.9 mm), a 1/4 inch diameter inner diameter bushing, and an M4 × 0.7 tapped set screw hole with full thread required in the knob body for secure shaft mounting. The knob incorporates a slotted set screw design with high-hardness brass hardware and includes dimensional tolerances of ±0.005 inches for decimals and ±1/64 inch for fractions. This knob is commonly used in control panels, instrumentation, and equipment requiring reliable manual operation with secure fastening.