The indentation in the perimeter improves maneuverability. Outer diameter: 0.8 inches (20 mm). Knob height: 0.6 inches (16 mm). Thread dimensions: M6 x 0.4 inches (1.00 mm). Thread length: 1.0 inches (25 mm). Heat resistant temperature: 28.6 °F (130 °C). Thread type: Polyamide (PA). Screw: Steel.
●外周のくぼみが操作性を向上させる