[Thread Size] - Thread Diameter: M4; Thread Pitch: 0.7mm/ 0.03; Rod Length: 20mm/ 0.79; Thread Style: Fully Thread. [Screw Head] - Head Style: Round Knurled Head; Head Diameter: 9.5mm/ 0.37"; Head Thickness: 8mm/ 0.31". The larger the diameter of the thumb portion, the greater the clamping force that can be applied. [Material] - Made of brass with a nickel plated finish, this thumb screw Knob is good for needs requiring high appearance, has corrosion resistance, rust resistance, and long-lasting service. [Applications] - Widely used in the installation, maintenance, and fixing of various daily needs: such as light covers, musical instruments, mechanical assemblies, electronic equipment, communication equipment, ornamental products, and so on.
