Konoe Iron Nickel Spring Washer M20 (140 pieces) SW-SS-6U-20 1 box

Catalogue number: SW-SS-6U-20 Features: ●Part of the flat washer has been broken off to form a coil shape. ●This shape acts as a spring, preventing loosening and falling off when loosened. ●It prevents loosening by scratching and biting into the bolt seat and nut. ●Even if a tightened screw loosens slightly, the spring's repulsive force presses against it, increasing friction and preventing the screw or nut from coming off. Specifications: ●Nominal diameter: M20 ●Outer diameter (mm): 33.8 ●Inner diameter (mm): 20.2 ●Thickness (mm): 5.1 Material/Finish: ●Material: Steel ●Surface treatment: Unichrome